If we don't tell them the UI svcks (especially for PC) then how will they ever know it svcks? If we and the media hadn't told Bethesda that the level scaling in Oblivion was horrendously, badly done then they would never have improved on it in Fallout 3 and Skyrim.
There's still plenty of praise, and there will be time for praise. But now is the time for criticism. Imagine if we had been able to foresee just how bad level scaling was going to be in Oblivion...it would have saved everyone a lot of time and given Bethesda a chance to correct it. Instead the game went live with it and we got a worse product then it could have been. Trust me, things like Obscuro's Oblivion Overhaul and DarNified UI embarrass Bethesda. They know they went wrong. We really have to rely on modders yet again to get a decent PC UI? Ridiculous.
EDIT: To support my point, read the Shivering Isles Fan interview...even Todd admits they messed up on the PC UI. :foodndrink: