Still a little early to arrive at this conclusion about Daboll. Yeah, he's failed as OC in the past on some bad teams; Miami, Cleveland, and KC, all which had little talent at QB and the offensive side of the ball. We have added talent this year, but still have room to improve. I wouldn't judge Daboll on last year.
Josh Allen's problems are more a result of poor decision making (ints) and not Daboll's fault. Daboll has tried to drill it into Josh to look for the safe out, rather than force the long ball when nothing is there. The Bills offense has not implemented Daboll's complete offense yet due to Josh still learning the NFL QB position. More time is needed at this point.