I'm an OF sitting in Lower West and am totally fine with the bleachers.
Chairbacks in the Benz are comfortable, but not conducive to standing up for most of the game, or at least on 3rd downs.
Also, bleachers make it easier to enter and exit by hopping rows vs waiting on the aisles to clear.
That said, the combination of bleachers with those crappy seatbacks is untenable, at least around my seats.
The ones in front of me take away all my knee space if I also use one, and they accentuate the narrowness of each bleacher seat during a crowded game. Go all in, or keep the bleachers with no temporary chairbacks.