Ye i agree, you hypothetically should be able to master everything, but it should be very timeconsuming to do. Sure sandbox is one thing, that doesn't mean that being a master of everything should just be a matter of a few hours of grinding. If it were, there would be no need to focus on anything, since it is so ez to just be good in everything. At that point it isn't roleplaying anymore, since you can fill any role, roleplaying necessitates some kind of limitation. If you are a jack of all trades you should be master of none and if you mastered a few skills you shouldnt be proficient with many other ones. As i said, hypothetically, since the game has no enddate, you should be able to master them all, but again, an incredible amount of time should be necessary for that.
The current hardcap of lvling and skills is just broken. I didnt experience it yet, since i dindt play a single campaign for more than 10 years, but from what i heard there comes a point where further lvling isn't even possible anymore, because of this convoluted system, so thats a big pile of crap that needs to fixed.
And yes, i totally agree with a revamp of the skilltrees overall. The combat skills seem ok, even though they certainly also could be tweaked, but all the social, intelligence,cunning stuff is absolute crap. Most are not implemented at all and even if they were, they are all over the place.
Why do i need 200 in trade to barter with fiefs, bartering with fiefs seems such a cool mechanic, but only those who grinded to 200 trade can do it. I could understand if it and barter in general would be way easier with high trade, but locking the mechanic altogether behind that absurdly high wall is just taking away fun from the player and makes no sense from a realistic/historic point of view.