In my opinion they eliminated pretty much all the depth in character developement, it feels so casual and shallow, you don't need to play the full game to have seen everything.
Skills have become pretty static, because you don't need to invest a lot to learn higher skills. So you will get pretty early your final skill setup and combats become a routine of specific skills in specific orders.
Armour and attribute system have killed the biggest selling point from first game, being able to mix every skilltree with each other as much as you wish.
Leveling attributes got pretty pointless and warfare gives you better physical damage turnout overall than your scoundrel or hunter skills would. And summoner ist the only skill tree that rewards you with something special for maxing it.
They took away secondary effect stuff like AP cost reductions, increased AP generation and cooldown reductions but had no idea of how to replace those side benefits. So most skills and attributes now do only one shallow job: increasing your damage. Nothing do be creative about or make a distinctive different character setup like in the first game.
Not to mention that physical is overall superior to magical: damage influenced by weapons, no resistances/immunities so different weapon types don't matter anymore, CC does not need two layers, inventory size, warfare goes for everything.
Because most people don't want to me write about those issues anymore.
Unfortunately I believe posting these issues is a pointless exercise. There isn't much a chance Larian will fix them except with an Enhanced Edition, as save game compatibility is a pretty important thing.
I do fully, 100% agree though which is why I'm developing an extensive overhaul for combat and character progression (can be found in Projects in Progress). I'll probably post another update in the next few days on it with my progress.
Overall DOS2 has been relatively disappointing to me compared to DOS1, but just know that work is being done to fix these issues.
As far as your idea for the armor system, Yasen, if I'm understanding it correctly (Not to be harsh, but paragraphs/periods/commas go a long way, so I may not be..) it was actually one of the first systems I had thought about when thinking of a better way to handle statuses. I dismissed it pretty quickly as it felt relatively unintuitive and has most of the same issues the current armor system has.
