I'd be fine bringing LaFell back despite his obvious shortcomings.
Why? We have no one else. Run blocking is always needed. He could be a decent #3 or 4 should we find replacements. But. it's all contingent on him re-signing for a million at most.
Honestly, I think Panther fans have come to regard WR blocking too highly because we aren't used to having anyone other than steve who can actually catch. Too much emphasis is placed on lafell being able to do his third or fourth responsibility as a receiver after catching, scoring touchdowns, and running routes. If he was actually a receiving threat, there would have been no discussion on whether to bring him back or not. 9 times out of 10 a run doesn't make it to the second level, and in those instances, yes it's nice to have a WR who can block. However It really isn't that important in the grand scheme of the position.