I think at least the part about having the AI play ladder to get a real strength rating for them is interesting. It would be similar to what was done with AlphaStar in StarCraft.
Would that already be possible atm, queuing up and having the AI play?
Having AI with an actual rating would be pretty useful, it would give you a consistent and always available way to gauge your own skill as a new player. There are many who are scared of starting ladder because they don't know what to expect or because they fear getting destroyed in their first games; with an AI with known rating it would help a bit with what to expect.