The Browns need a "fixer" someone that has instant credibility and demands respect. Someone who can change the face of the franchise. Much like Parcells did in NE. Jackson is not that, he is yet another little known assistant who is just "glad to get another Head Coaching gig.
Coughlin would have been a great hire, the Browns are so many problems it's not funny, but there #1 problem is leadership. Who runs the team? What is their philosophy? Questions that nobody can answer. Look for the Browns to suck again. Once again they go into the off season with a new coach and looking for their starting QB, which is a recipe for disaster!
If I ran the Browns I would trade away Thomas for a #1 pick, get what you can for Manziel and Gordon, and rebuild their defense first and wait until there is a franchise QB available in the draft/trade instead of wasting yet another first round pick on a reach at QB.