There is a bit of frustration to be found right now as it's not quite there but I've watched some Warband let's play on youtube to refresh my memory and I think it would be hard to go back despite the roughness.
The levelling system is really cool. You get better by actually taking actions in game and you can unlock perks in every skills. Character creation feels a lot more streamlined and it feels more like making roleplaying decisions before the game even begins (I just love that sort of things).
"Growing old is inevitable but growing up is optional."