@boom For players that are totally new, automatching vs AI won't help as much as a tutorial which teaches from scratch. While, yes playing vs Ai is a proportion of games, which I've stated before, many of these involve an individual or a group of mates playing vs Ai because: A) they're either all not confident enough to play vs other players or B) they prefer playing a relaxed game
Now if they aren't confident in playing PvP then in my mind, it's better to focus on prompting PvP through Ladder, Tmm, training, etc. otherwise some players never make the bridge over to PvP. If they want to play a more chilled out game then they probably would pick a setup where they can decide the map, difficulty, mods etc. over being auto matched against an Ai.
My last point would be how many people would actually use it? I write this at 12:30 GMT on a Saturday and there are no unmodded custom games vs Ai hosted. A realistic rate for this maybe what, 3 games an hour?
The intentions are good, but I can't be blindly optimistic about this idea and it's because of these reasons that I don't think it's worth the time to create a new automatching system, especially when there are other large projects in the works.