The thing is that most people don't play games like this for the combat. Of course the combat system is important, it can make or break a game; but people who play the DA franchise don't choose to play the game specifically because of it. People choose to play rpgs for different reasons.
Which is why I think the issue lies more with the overall character immersion/ development. Think of all the people who absolutely loved DA:O, a game where you could customise your character from multiple, also racial choices (choices which would also occasionally reflect in the game, even though this could have been implemented a lot better); where you had a different background depending on the character; where could choose to speak with your party members whenever you wished without having to go back to a set location; where you could to at least a small measure interact with the environment, etc.
Now take DA2, where you are given only one possible origin: the Warden could have been anyone - but Hawke is always Hawke (which is also accentuated by his/ her voiceover dialogue). Just like in ME, you aren't given a choice on your character, which is rpg terms in not really ideal - especially in the second game of a franchise, which you expect to follow up on the first one on certain things which made that game unique.
Then take the infamous dialogue wheel, where you can choose between 3 sentiments that your Hawke can express, instead of the multiple choices you had in DA:O - again a seeming limitation of how you can develop your Hawke.
Also, look at the way the two games start. In DA:O you have time to explore your initial character story, it starts slowly and builds up, you get to know the environment you grew up in, it shows you your roots. In DA2 (in DA:I aswell, btw) you are thrown into the story, and it is immediately action-packed; you don't have time to get a feel for your character or for your character's place in the world before the story starts.
Add to that the fact that you could only talk to your companions in certain limited areas instead of on the field, and that the environment couldn't be interacted with whatsoever, and all the over irksome things (like the copy-pasted caves and such) and you will get enough people who, from a roleplaying point of view, will not enjoy this game.