I would consider Todd Howard to be part of development (since he directs the creative and narrative angle, from what I understand).

He defended bad performance with "get better hardware". He defended criticism of the content with "you play the game wrong".

Both are bullshit "excuses". The first one was even debunked by modders who showed that there was potential for optimization. And modders are far more limited than engine devs. The game doesn't look ugly, but there are far better looking games with more scene complexity out there that run better.

And "you play it wrong" is bullshit because if enough people play it wrong to have an effect on the rating of the game, then the game is badly designed. Part of game design is making sure the game explains itself or subtly pulls players in the right direction. Either they failed with that, or there simply is no clear direction. But that's not the players fault.