Having been friends with several of the old BIS developers, some of whom are obviously at Obsidian, I'll defend them: Obsidian lack the capital to be publishers. As such, they can't always test out their games entirely or patch what needs fixing. That's the decision of the publishers.
Wonderful case in point is Bethesda pulling the support plug after the last DLCs (Lonesome Road and the two item DLCs). Hello? What? You're releasing three DLCs and not a final patch. You always release a patch after a DLC, especially three.
Support is the publisher's responsibility and IMO, Bethesda really screwed the pooch and a damned enjoyable game from Obsidian.