Boudreau is still very well liked in MN. Firing him would be unpopular, and put huge pressure on the new management. With the players that they have, they aren't going anywhere. Might as well ride out BB's contract, and, depending on how things go, look to re-signing him.
I'm not sure that he would re-sign, with the **** he has had to go through.
Off-season gives better coaching options anyway so riding out the contract isn't impossible scenario even if Guerin wants his own guy there.