Budget was not the reason I remember them giving (I accept budgetary constraints as a valid reason, but its not the reason they gave). This notion of angering gamers from the other games was, and I just don't understand it. It seems the height of bizarre, grasping and possessive behaviour to want to disallow people from romancing 'your' partner. If the character was in a relationship in your version of Origins, that's one thing - simply diallow the romance if they are listed in your version of the game as being in a romance). But if the character is single, then I just don't see what anyone has to complain about - why do the opinions of other gamers and their choice of optional romances have any bearing on my (or anyone else's) games?
It just doesn't make any sense to me at all. If Morrigan or Leliana were not romanced in Origins, they must therefore stay single forever? They can't even have relationships that don't include the Inquisitor for example? I don't see what anyone has to complain about, if they are paired up with someone else, if they are single at the time. Why shouldn't that happen (or at least be able to happen like... I don't know Cullen and Leliana or something?) Don't get me wrong on this - I'm not particularly interested in romancing either of them in DAI. Its more the principle that has been established here that bewilders me. And I probably wouldn't even have thought much about it, if the actual romances you could engage in were better realized.
Like I say, I find the whole system of how romances work to be flawed in Bioware games. 3-4 flirtations, and 1-2 dedicated courting/getting to know you better scenes make for a very shallow and unsatisying romance. As does the almost complete lack of further scenes once the romance begins. They've never done this very well, and DAI is no exception. The only difference is that this time, I also wasn't taken with the LIs in even a general sense. And this is just in the confines of a single game - its even worse when they try to establish continuity of romances across multiple games, constantly seperating (and in some case outright sabotaging) these romances.