I can understand where you are coming from on the grades. 60+ grades for OL is good in PFF land. For context, goto the positional report for OL and you can see the highest grades out there and where individuals place relative to other OL.
For example, only two tackles graded above 80.0. 5 graded in the 70s.
Also, they are grading every play not just plays where the ball is run behind them. Its a +/- scale in increments of 0.5 between -2.0 and +2.0.
I thought Allen was bad. Overpowered and run past. He didnt bring anything positive imo. Ill watch the tape but he was very disappointing.
Didnt really get a feel for the others live.