I don't think firing Mo is the answer, he's a good coach despite what the arm chair experts around here think. You want to see a shake up, you have to make some trades.
I said in another thread that most will attribute the Islanders turnaround to adding Barry Trotz but I think moving Tavares out and adding Filppula, Toews, Komarov, Martin, Kuhnhackl and Lehner had a far greater effect.
This roster needs a shakeup. We have far to much offensive power on it and not enough ice time to go around. We also have some pretty weak guys on defence. We need to make a big shakeup trade.
There's a good chance Trouba forces our hand into something similar you are describing.
If Chevy can make lemonade out of a lemon it could turn out to be a blessing in disguise.
If we can keep CLT, Myers and Chiarot at reasonable AAV and term, plus add a pick and gain cap space... that could be a greater gain than the downgrade from Trouba to Myers.
That's my opinion though I know many aren't fans of Big Myers and his Big Corsi
As for Maurice, he will be on thin ice if things dont go well early on. He will get a token extension, but if the team looks bubble or worse, Chevy and Chipman wont wait too long.
If Maurice can do everything in his power to get better as a coach, that's all he can do. The results will speak for themselves.