Really awesome to see the creative thinking and constructive discussion on this one.
Sounds like we have more to lose, and not much to gain my introducing alBTC with only a few weeks/months lead on v2. I don't like the extra complexity and risk it introduced no a v1 -> v2 migration. We've waited this long (only long in crypto time) for alBTC. My vote is to stick with the patient approach at this point.
If we had this discussion a few months ago, it might have made sense to bring in the big three ahead of v2. Or if we were looking at another 6 months plus until v2, it would be worth considering this step of stepping stone upgrade.
As an aside, I'm also under the impression that alETH is performing very differently than alUSD -- it's easier for people to make a 2:1 calculation on stablecoin value. A 4:1 on a volatile asset is a bit harder to know how to leverage. I'm guessing more integrations with things like spell, curve, ohm, toke, etc is what's really going to help drive alassets.