I agree that the situation with Husso (and AHL in general) is potentially worrisome. It is even more worrisome for Husso, than others. First, there are less goalie spots available, and one goalie plays the whole game. So if someone else gets the start, chances are Husso gets no ice time that game. A skater, on the other hand, would get at least some time. Secondly, ice-time for skaters is more a in the heat of the moment decision. If a skater is doing well and the team is down, a coach may favor that player regardless of any directive from on-high to develop team-owned prospects. But goalie decisions are made before the game, and can be more calculated.
However, looking up the information about the Rampage in particular, I am less worried. They are not owned by the Avalanche, and only have an affiliate agreement. I don't know the particulars of that agreement, but I assume it is similar to Chicago where being competitive and selling tickets is balanced with player development. They don't have a long standing relationship with the Avs either, and have changed teams twice before in their short lifetime. I doubt the Avs have a ton of leverage against them. They are owned by a purely for-profit sports management company, the same one who owns the Spurs and several other San Antonio sports teams. Their loyalty is to San Antonio, and San Antonio sports. So they will be more concerned with giving San Antonio fans a good product, than developing Colorado assets.
Therefore I think if Husso proves himself the best goalie, he will be given minutes over lesser guys. He may have to be head and shoulders better, but he should be capable of that given the competition. Canaata is a throwaway. He was traded for in a deadline deal last year to replace Smith who was called up. He is a 27-year old career AHL'er. Brittain is an AHL signee. He is purely practice squad in case of injuries signee. So he only has to beat out Martin, and Martin's stats last year were not great. Even if he can't, he will be the primary back-up, which will probably be close to a 50-50 split.