(yes i'll be mentioning Fallout 3)
I noticed in Fallout 3 that Bethesda seemed to pay way more attention to DLC than they should have done. This resulted in the game feeling very much 'unfinished' with the main quest actually being unfinished in my opinion. I am worried that Bethesda are exploiting this new way of purchasing game add ons by simply making the game whilst it's on sale. Fallout 3 was not a completed game without the add ons in my opinion and the add ons really are quite expensive. When I buy a game I expect everything to be there, not a half completed game with more things to be added in later.
Now Oblivion had some excellent add ons but the difference between these add ons were that the original Oblivion game was complete, it was jam packed with quests and things to do and had a well rounded amount of quests. In fact the Shivering Isles was fantastic and no doubt if a DLC like that was released I would buy it but that's because it was a real project, something that added to the game not completed it.
My question is that are you worried that Bethesda now think that they can release astronomical amounts of DLC thinking that it can make up for a game that isn't astounding in the first place?