Yep, I pretty much agree with what you've said. I'm only in Act II, but I'm finding all of these "add-ons" to be fairly useless, and in some cases, annoying.
The BF idea is great, but having 6 BF dungeons in act II seems like a bit much. The 3 in Act I were sufficient. Having 3 per act would be enough, I would think.
The only use I've found for the summoning dolls so far is to set off traps. With the teleporter stones, I find I don't really use them as mules.
I'm still enjoying the game, but sometimes "less is more" as in DD.