They should have done this in the first place, use the draft to build up the OL and bring in someone like Carr to be the QB. This team refuses to rebuild so I'm not entirely sure why they thought bringing in a rookie QB who's a 2nd rounder in a normal year to replace Ben was going to work. Especially when the team had major issues offensively even while having Ben.
Pickett is just another guy on this level, but this team isn't a better QB away from doing...well, anything. Frankly I don't even know what you can do about this offense without just tearing it down, which they obviously won't do.