I played both of these games, but I didn't finish either of them. I consider both of them pretty bad, but I still find DA2 somewhat worse.
When I played DAO I managed to get through the origin, the battle and then do some more shit (not much tho, the game was really boring). When I played DA2 I managed to get to the city and by that time it was obvious how terrible the game was. It had pretty much all the flaws of the previous game, but they managed to fuck up the camera, combat, locations, etc. even more.
I mean the camera was shitty even in the first game, but in DA2 you practically couldn't zoom out at all, just pan the camera. The combat was shit in DAO, based only on cooldowns, simple mana/energy mechanic, retarded hp attrition encounter design and lots of trash, but from what I've seen in the second game it seemed even worse, plus they added those flashy animations. As for the locations, well - the locations in the first game were quite small, but at least they didn't feel like a corridor and had some minimal sense of exploration. As for the story - it was retarded in both games. I just can't take mainstream approaches to epic high fantasy anymore. The only thing I found interesting about the whole setting was the fade (do I remember the name correctly?) mechanic, which I didn't feel was properly fleshed out. Otherwise the whole story and setting felt like a huge cliche.
I just realized what I hated about the (first) game. The areas felt very disconnected to me. Every area had its own story which was sometimes tied to the main story in some way, but other than that the areas felt completely separated. The story of the area was brought to a closure and it didn't really affect anything else, only maybe some NPC might have commented on it, but that's just flavor. For me it felt like a series of small adventures and this is precisely why I hate DLCs. I realized this when I was watching Cleve's pitch for Grimoire when he said: "Everything in Grimiore is related to everything else.". Now I'm not sure if that's really true in Grimoire, but I like when games at least attempt to do this.