I'm not sure it's the niche or targeting problem. I think we're getting games with flat out fewer features and smaller scope than earlier entries in the series because _so_ much energy is disproportionately put into graphics. DA:VG was trimmed and had vastly less complexity and depth than any previous DA.
I'm not certain if that's time/budget versus "simplifying the game for everyone".
It's easier to balance a game with 10 "sets" of armor + weapon - as opposed to having a myriad options of armor per body part and weapon combos/etc. DA:VG was the most beautiful but shallow Dragon Age game.