BG2 isn't an action RPG, DA:O sort of is, but not really.
Play The Witcher, then play The Witcher 2.
You can clearly see that the sequel was originally made with console playability in mind and whilst it's different, it absolutely doesn't suffer for it.
I don't want to judge games based what platforms are they using but Witcher 2 has some problems from being created with consoles in mind.
1. Item menus. List menus DON'T work well for mouse users. Grid based item menus are the best for mouse gamers. They had to do lists because grid based one don't work well for consoles.
2. Text or rather it's shortage of and it's positioning and scale. Every choice you make in game is described in few words rather that full quotes because console text needs to be big and because it is big it is cumberstone for people who use mouse.
3. Mouse lag. You can say that this is not really a problem of console/PC but there is rather good source material of games developed with consoles in mind or for consoles that suffer from this issue. In Witcher 2 it is not terrible as in New Vegas but this is noticeable. Also there is more truth to it because Witcher 1 mouse lag was nonexistent.
4. Combat system. It is created with consoles in mind. Old combat system simply would not work for consoles. It's not bad and it is not - for a game but reason why there are so little games that involve action combat ala Dark Souls on PC games are precisely controller meaning mouse and keyboard being problem for action games. First witcher had maybe a little boring combat after a while but they could make it vastly better in 2. For example i could target people all around me and Geralt would do those crazy over the top combos sometimes fluidly moving from one enemy to another and sometimes it was awesome to watch as he just speed up witch each successful timed click. But they could not evolve it if they wanted to do a console port.
This does not make a Witcher 2 a bad game it is only proof that The Witcher 2 was not created as only PC game in mind and it does suffer from that. Not graphically but in same vain as New Vegas meaning janky list menus which don't really work for PC, mouse and keyboard lag, quick menu that is not quick for pc gamers, no ability to name saves yourself, text size and placement and what is included in choices, cumberstone looting and many more of those small things that add to overall experience.
CDPR did fantastic job with TW2 but saying that they didn't change game for PC because it was also with consoles in mind is false. They did change and they did get flack from that.
Part of the reason why they got flack was that for example their UI was trying to gather two opposite sides (mouse and pad) and combine them.
I Hope CDPR will do different UI to different systems in TW3.