I got a civvy-uni ROTP offer about a month ago and might be able to answer some questions.
I was told that just like RMC is full for this year, BMOQ is also full for the summer. It's not actually a requirement that we have to do BMOQ before going to uni; the rule is that CAF members need to complete BMOQ (or at least do mod 1, in ROTP's case) in their FIRST summer after enrolling. That's why, at least out of the people I've talked to that also got Civvy-U offers, everyone's enrolling at the end of August (so our "first summer" isn't until 2023). Whether or not we're going to be doing both modules of BMOQ next summer, I don't know. I would guess we would be, since the RMC class of '25 missed mod 1 because of COVID and had to do both mods this summer to catch up. But as far as pay goes, we'll definitely be getting put on salary and have tuition reimbursed this year. The contract stipulates that all four years of education are to be subsidized.
As far as transferring goes, I hate to knock the wind out of your sails here if that was something that you were hoping to do, but it's not too likely that a transfer will be approved. I asked that exact question to my MCC. It's not the same as if you were to apply to ROTP for the first time while you were in your first year of civilian university, and planned on going to RMC for the remaining three years of your education (which happens all the time). Once you enroll on a civvy-u ROTP contract, the Forces has logistically planned for you to remain at civilian university for all four years. I'm not saying it's impossible. It's just difficult to pull off, because it requires a lot of work on the logistical side of things for the Forces. It's much, much easier for them to simply get you to finish your degree at Civvy-Uni, and give any new bed-space at RMC to the next incoming class.
I feel your pain though on how hard it is to get answers relating to Civvy-U ROTP. I've been told that almost all the questions I have will be answered closer to enrolling, when flights are given out, and you're set up to contact your ULO (Officer that takes care of your file personally while in ROTP). The problem is that it looks like they're only giving us about 2 days of time in between the time I (and the others I've talked to) enroll, and the time we fly out to our uni's. Not a ton of time to get everything sorted out. But it's the way it goes, I guess.