I think I'd agree with that assessment. Although Skyrim didn't have some of DA2's more glaring flaws, it left me feeling similarly unfulfilled at the end; though if anything, I probably preferred DA2. There, I said it.
I have to agree.
I think the hate comes, partially, from the fact that they had way too big of a shadow standing over them. Same goes for Skyrim, Uncharted 3, and few other sequels. People love the original so much that when they release the next game, its just can't live up to its predecessor's greatness. On their own, their pretty good. But considering their the next major title in the series, people are disappointed because they expected it to be on par with the first game.
Sure, DA2 also has reused environments, no top-down view, and its main focus has been moved to the console generation (instead of the PC like the original), and it has a whole host of fetch quests, and a couple game crippling bugs (fixed by patches), but under all of the problems is a solid game with decent writing, excellent characters and companions, a great friendship/rivalry system, and solid RPG mechanics. They did the best they could with their 8 month development window, which is the only part of my disappointment I will associate with EA (In truth, it was a main reason for a good amount of the issues). Some of Bioware's choices when making the game disappointed a lot of fans, and that is all on them. They still created the game, and need to stand behind their decisions, or fix them in the future.
I was content with it. The Internet makes it seem like the plague of this generation, but I personally found Skyrim a bigger disappointment. At least some of the choices you make in DAII might matter. Sometime. In the distant future. Hopefully in a game that returns to its Dragon Age: Origins roots.