Region (NA/EU):    NA

Tagging is already super good and easy.

Half billion is not much when players can earn over billion per hour grinding monsters. Or earn few billiom just from fishing.

There are many games where gear is locked to 1 character. Having a tagging is so good for us.

If half billion is too much then do not retag so often.

Also if tagging system is removed and having some cheaper option the economy would get a hit again as good money sink is removed

Yeah money sinks are super important, having a system that uses people trying new characters as a money sink is not.

Punishing new players, crazy janky inconvience; nodewar hoping, trade goods, fish, town of attachement blah blah blah etc.

This system sucks and holds the game back

Current Tagging system is already a huge help to all players. The price of half bil is not big loss unless you do it every day, but at that point you should ask "why i am making this hard on myself?". 
Other games does not even allow you sharing gear like BDO. There you need to gear up each character 0-100
Some other mmo games locks all gear on 1 character so cannot even move gear over to other characters.

For new class testing, you still need leveling up. I doubt that you will like a class when having 800gs, if you hate it while having PEN Tuvala gear before.

Trading goods is blocked to avoid abuse of faster/safer travel
Fishing, hmm... well why not use alt for life skilling anyways? Why slap yourself by running from grind spot to fishing every time?
Town attachement thing, that is good point. But not a problem when we have Magnus

Good points
Unlimited Shared exp and shared gearing
Also have 2 characters in same location all the time, so when want to swap characters feel free to do so without running 2 character back and forth