So, in looking at this objectively, a few thoughts:
UPL is entering his 5th season. He is waiver exempt for 29 more games (per capfriendly). This does make him not getting any starts late in the season. He's also on a one way deal next year, meaning he makes 925k either way.
Comrie would have to pass thru waivers. They can buy him out for 1.2M spread over 2 years (600k a year). I'm not seeing him getting claimed unless another team runs into injury issues.
Regardless of what you want to do with Levi, I don't think anyone wants to see him start 50 games next year. That means, you need someone to eat most of the starts.
Who will do that?
Comrie? No
UPL? No.
So, that puts us in the position we need to add an outside goalie. UFA, trade, etc. Doesn't matter how. We have to add a goalie.
The question is, who is the odd goalie out.
IF we are talking in terms of disposability, Comrie is the obvious answer. He's probably never going to be a starter in this league. He's, at best, an average backup. On a good defensive team, he will look good. On our team, as is? He's going to look bad.
UPL has upside. Will he ever achieve it? That is another question. There will likely be a team interested in taking him, especially since he can go to the minors for one more year. I've floated Calgary as a possibility with Wolf likely ascending to the big club next year. But...it's not like we are going to get a king's ransom at this point.
So, in terms of plans, there are two:
You go get a starting goalie. Two year term is probably the magic number here. Someone who is OK with potentially being in a split start situation, but also understands the team is about winning, so, the best goalie will get more starts.
This is where it diverges a bit. You move UPL, then I think the obvious plan is, at least to start the season:
Comrie as backup, Levi to the AHL. That isn't to say Levi won't get starts, he will. Injuries happen, he may just flat out earn a callup.
However, if you move out Comrie and get a vet starter, then I think there is at least a bit of intrigue what to do. You COULD simply make it an open competition for the 2nd goalie role. Just let UPL and Levi fight it out. I think you could put the thumb on the scale for UPL a bit, just to get Levi some extra starts in the AHL....but if Levi is a clear winner, UPL can go to Rochester with no risk of being claimed. And it likely wouldn't be the last we see of him either way.
The option of UPL/Levi fighting for the 2nd goalie slot is intriguing to me. It's a bit of a hedge on Levi. If he struggles adjusted to the pros, etc, we have another young goalie. I think it would also be very wise to get a veteran goalie coach in here ASAP. Someone to work with both of them, watch tape with them, etc.
What you absolutely cannot do is come to camp next year with Comrie/Levi/UPL and just hope for the best. It's a recipe for a disaster. We need some veteran stability to go with young upside. Cormie doesn't provide any stability as a regular starter.