There are many schools of thought in how to make this team into a playoff contender year in and year out.Not without a real in-house replacement, though. It hasn't been that long since we've had the likes of Cleo Lemon, Chad Henne and so many forgettable others.
Of cause, a good HC. Everyone knows that. Let go beyond that.
This team is in such disarrayed that I am for blowing it up and start from the ground. And I believe beside an elite QB, you always build from the ground up, meaning start with OL and DL. Therefore I rather have a good OL first, than to hang on to an average ( or may be above average ) QB in RT.