As you acknowledged in the FESTA, there are just way too many items that are cluttering our inventory and storages. I understand that this is partly deliberate to keep players busy and stimulated, but it's really overwhelming for new and veteran players alike.

There are just too many scrolls, materials, black stones, special coins... scrolls with similar effects can be consolidated; all currencies can go into an account-wide wallet; why do we need 100 different enhancement mats? Consolidate them and increase the cost.

We need this change ASAP!

I second this, although I am not sure why you would desire to increase the cost, but I am all for consolidation, it truly does get overwhelming and I have been playing MMORPG's since Asheron's Call. My wife just started playing MMOs and it has her going mad. She is constantly bombarded with items that are exactly the same, but won't stack because one is event, the other is normal, but they have duplicate stats, even the names are the same. She has an inventory full of stuff and she is scared to delete anything due to the fact that something she deleted once that looked like trash, turned out to be something pretty important. Other than the insanly difficult RNG in this game (I have played others with similar RNG tactics to keep players playing through the addiction of gambling, which RNG essentially is...) being far more complex and difficult than any other game I have ever played, the only complaint I have is with how much stuff you always end up with in your inventory. It's truly overwhelming IMO.

I definitely agree. I've maxed out my bag space and I still struggle if I take a break and come back. 

Pearl inventory space is another issue but that's for another thread.

What I envision for the consoledation of items to be is, Black stones will no longer be weapon or armor just black stones, same as concentrated stones, hards and sharps.  Meats will be Red Meat, Bird Meat, Reptile Meat, fish, shellfish, crustations.  Bloods will be weak blood, thick blood, powerful blood, thin blood since we have 4 types already.  Grain flour and Dough will be just flour or dough instead of Wheat, Barley and so on.  Hides will be hard hide scraps, thick hide scraps, fur scraps, fancy feather scraps instead of the base versions.  

I can't think of anything else that needs consoledation off the top of my head that would make sense to combine.  

By "increase the cost" I believe they are referring to the amount of enhancement materials, and not the price of them. Instead of switching to concentrated black stones at 15, raise the number of black stones required for enhancement. I'm all for that. 

How about the 200+ buff elixirs? the tons of different food, most of them being useless? how about not having to activate half a dozen separate exp scrolls to farm exp?

The elixir buffs have Draughts for that.  

One easy change would be to get rid of awakened boss scrolls and awakened boss scroll parts. Just make summoning stronger bosses consume more regular scrolls, just like how ancient relics do it now. Tons of inventory spaces saved instantly. If they could make seeds stack, that would save a lot of space for anyone who does farming. A lot of untradeable event items should just be turned into tradeable versions so you don't have two different stacks of perfumes or what-have-you. Other items with different versions can also be combined, eg there are multiple versions of item brand spell stones which all do the same thing, same with elion's tears.