This is very cool and I can see a thousand use cases. I will make the following cautionary note:
WARNING: If you use outcalls(other than fire and forget) you may be abandoning the cryptographic guarantees and deterministic guarantees that most expect from ‘classic’ crypto dapps.
These may not be necessary for your canister, and if not, then carry on, but if they are, then just keep in mind there is a bunch you’ll need to consider and plan for if you want to keep those properties.