These are just some simple ideas to improve underperforming lifeskills or quality of life changes for any lifeskill . Please add to this post any extra changes you would like to see for lifeskills to make them better and more fun.
1.Gathering/Hunting :
-Add an option/setting to auto-loot after gathering , i don't see the point to press R twice per gather all the time , it is just extra work for no reason honestly , no one wants to discard anything so why is there the need to press R twice everytime (same goes for grinding, but there you have pets so it's not a big deal)

2.Fishing :
-Slightly buff afk fishing with imperials and trading but add more ways to do active fishing ( real active not pressing WASD which can involve fishbotting issues )  
-Harpooning and searching for hotspots are good ideas , expand on that and make it more rewarding/relevant as a lifeskill

3.Cooking :
-It is solid at the moment , would be nice to buff/add more ways to get milk or eggs ( maybe a farming/gathering buff?)

4.Alchemy :
-Imperial is the main reason cooking is strong , straight up buffing imperial alchemy can cause a big economy nerf for cooking , balacing both at the same time is hard , even if half of the people do cooking and half alchemy that is still a nerf for cooking but we know balance is not a thing , there will always be one that is "meta"/ straight up much better.
-We should be able to deliver both boxes of each type per day without affecting each other's daily cap (they are two different lifeskills after all). Some might find this an extra chore/daily grind but remember you can buy materials from the market and deliver them in less than 1-2 min , but this should help alchemy a lot and give it a fair chance as a lifeskill , there is no reason alchemy should compete with cooking by sharing the daily cap.

5.Processing :

-Compared to other semi-afk activities this is very lacking , i propose to reduce the LT(weight) of all processed materials and make it afk for a longer period of time instead of straight buffing the money/h

6.Trading :
-Making crates and having a profit sounds great but when you take in consideration that you have to deliver those crates to valencia which takes 40-45 min at least and it's very risky ( can't be done afk ) for the money it gives ,then you are better spending the time in another lifeskill and make more money with the time it takes you to deliver those crates to valencia
-i propose to buff the transportation method wagon and increase the max capacity of weight  by at least 4-5 times or decrease the crates LT so you could transport a decent amount of crates via wagon instead of wasting time riding a slow horse with the risk to lose everything ( trading is not that rewarding to require such a big risk )

7.Training :
-For active training change the minigame , no one wants to break their keyboards ,just change it to whatever else which doesn't require spamming which is not fun nor healthy
-We need changes to the way horse market works , please add a bidding for at least 1 min to avoid sniping and give everyone a fair chance at a horse, maybe add free market for tier 9 horses as well with the amount of t9s on the market that never get sold because they are the same price
-Adding more horse tiers or changing the way caught horses tier works, could be rng but it makes sense if more horse tiers are added in the wild because those would be too powerful to have a specific location every time
- For afk training , give more training xp the higher the lvl the horse is , improve auto-looping

8.Farming :
-Slightly increase the amount of fruits given by normal-magical seeds and significantly increase the amount of fruits given by mysterious seeds. Buff milk and egg farming as well. Make farming level not useless past master 1 ( maybe increase the chance for moles or mysterious seeds or something new)

9.Sailing :
-Nothing is worse than having to do daily missions to get sailing xp which is the only option to get any amount of sailing xp that is significant . Buff the sea monster hunting xp significantly to be able to reach past guru level without having to do any daily missions ever, make daily missions optional not mandatory for sailing levels.

10.Bartering :
-At least double the price of all barter goods and double the crow coins gain as well to make bartering a decent amount of money for the time you spend making a carrack and not just 150-200m/h max with the best possible ship gear which takes too much time to make and not worth  the effort when you can just do whatever else instantly , not being time gated , and making more money/h.

1 yes

4 yes both should be seperate

5 yes lower weight i would also like for them 2 lower cooking and alchemy mats   instead of adding more weight options latest was 350 lt i think

8 yes

9 sure

1. I have no problem pressing "r"

2. Don't care much about fishing but making it better is a good thing. I might get into it.

3. Imo the base prices of the Imperial boxes should be buffed, 250ish mil per delivery ain't much these days. 

4. I don't know what would be the point of doing Imp alchemy delivery. It's much less money than cooking and alchemy is painful in general. It would be nice if both Imp deliveries do not compete.

6. I'm just transporting the boxes. Dealing with moving them by horse/wagon is painful and doesn't make any sense whatsoever. I'd rather spend the time gathering or grinding.

8. It would be nice to get a bit more fruits from farming. I've always done it the othe way around though - mysterios seeds for crops and magical for fodder and fruits.

9. Agree! On a side note - what do you mean past guru? Who is even close to guru? My god that's a lot of dailies. We need more sea content!

10. True, bartering could use a buff. I don't know if prices have been touched since release, they are lagging behind at this point. I don't know about doubling crow coins, I would be happy to get the rest of my blue gear faster. Is it a good idea to further reduce the carrack grind?