Both because most likely the next coach wont have a QB as good as Eli
My goal had been to win a championship, work toward the Hall of Fame, have my jersey retired by the team and I`d go in as a lifelong New York Giant, but I`m now resigned to the fact that this won`t happen. -- Michael Strahan, just when you think you're down...
Well LT is arguably the greatest player of all time, where Eli isn't even the greatest QB in his generation. So yeah that comparison is a bit of stretch especially considering we are comparing a QB to a LB here. That's not taking away anything from Eli though, unless you think he is the best QB in the game right now.
There are plenty of coaches that could replace Coughlin; only a few QBs can replace Eli.