It's unreasonable to expect Bioware to make a 100% clone of their earliest games.
Companies like Obsidian and inXile are able to create old-school RPG's a la Planescape because they operate as small businesses, cater to a niche crowd (of which I am a part), and make use of crowd funding (a relatively new phenomenon).
Edit:
@Travie I haven't played the Mass Effect series (not a scifi fan), so I can't comment on that, but I enjoyed DA II. There were a good mix of characters from diverse backgrounds, some genuinley touching moments in the game (e.g. Hawke's mother dying, his fireside chat with Leandra at the end of Legacy, etc.), and I enjoyed playing a more personal story for once.
I even thought SWTOR had it's moments. The end game wasn't there, but I thoroughly enjoyed playing through the different character classes and seeing the world-arch unfold.
Every game doesn't need to be an isometric RPG based on the D&D ruleset, nor would I want them to be.