One thing that always bugged me about McDermott was he never seemed to develop a strategy to match the players skills. It was always finding players that fit into his strategy.
as was mentioned, we had a couple big run stuffing DTs that came thru here, did well before and after, but did nothing with the Bills.
also a couple serviceable WRs that went on to continue to be serviceable but did nothing with the Bills.
and why retread players come back and end up on the field, play OK, but aren’t game changers.