The other lightning rod aspect to Bisaccia is that he's also the assistant head coach, fans not happy with MLF are also going to point to Bisaccia and say, "Is he helping at all??"
I've generally been a Gute supporter but one of my biggest gripes with Gute is, what I interpret to be, the carryover of the TT philosophy of just letting the bottom of the roster guys fill out special teams and call it a day. Sometimes you find good special teams guys that way but it's rolling the dice and showing that they don't really care about special teams that much. But time and time again it costs them wins, and sometimes super bowls. I get it, filling out a roster is hard and special teams is on the field a handful of times a game but when it's that much of an Achilles heel you'd like to think there could be a little more emphasis there.