Because Tressel violated NCAA rules. That comes with very stiff penalties. There was no way to keep him and salvage the football program. This is a different situation.
the roster this year is A LOT better than it was in 2011
when all else fails head here
I read a good quote somewhere that building a good receiving corps is a lot like building a basketball team. You want different body types that fill different roles and complement each other.
You want big receivers that can overmatch DBs but you also need smaller faster guys who can create in space and quick guys who can do the dirty work over the middle.