I've said the same. I actually like Blythe. But compared to the rest of the line- and given he's a free agent- center is the place to look. I think if you upgrade that spot it will help the guys on either side.
Corbett was solid overall. Edwards has the versatility to play either guard spot. Evans can play guard or RT. Noteboom is what he is- a good swing tackle.
And I agree 100% that a blocking TE3 may not sound like a 'wow' move but it's absolutely a need. TEs got blown up left and right blocking this year.
If those two areas on offense are shored up the running game could be fantastic next year with Akers. He could be a 1,300+ yards back.