Huh.
So I was wondering if you realized that the outcome of your proposal was “all requests for an AS must be satisfied immediately”.
But this sure looks like that is precisely what you meant.
If that’s not what you meant, you might want to explain what the approval constraints should be.
The best thing is when any LIR may claim one AS for one customer without any approval. Just if customer asking for AS - just give AS.
If customer asking for another and first AS is still spare (not multihomed) then some strategy may be required.
Yes, it's good idea to delegate pre approved AS-list to LIR for assigning to their customers.