Trading Monty = Forever rebuild
That's your logic? Like, everything falls down on Monty?
Yikes!
No, trading anything not bolted down is forever rebuild. There is no reason to sell Montembeault for an irrelevant return (like goalies get in season) when Montreal doesn't even have a backup NHL ready.
Running Primeau and Dobes/Hughes for the rest of the year would damage Montreal's reputation with their own players and UFAs.
How do you even face Suzuki, Caufield, Slafkovsky and Guhle who just comitted long term to your team after that? How do you tell them the rebuild is going to last 5 more years the time Fowler establish himself?
You're acting like this is EA NHL which explains why you had no idea who Jacob Perreault was.