What? The same old discussion about teleport is now going on with cloudwalk. Deja vu. I don't use it much, but leaving it in is an option for some players to use. If a player does not want to use it, then don't. Simple. Leave it in for those who want to use it. Or make it an option at game set up, with a check box to opt in or out.
The gist of your argument is that it's okay to have a incredibly unbalanced mechanic as long as only humans can use it so they can just pretend it doesn't exist? You could say the same thing about any other horribly unbalanced part of the game. Well it's fun abusing champion mobs and never building squads so they should just leave it in for those people who like that sort of thing.
One problem about leaving it in is that Brad is pretty good at AI, and it's possible he'll teach the AI to abuse its power. Then it's back to being broken. Opt out box is OK, although i'd rather see it replaced with something people wouldn't want to turn off.
Indeed it would be funny as hell to see some newb go "hey a empty city" and enter enemy territory then end his turn. Then baam a huge army consisting of every single AI unit and champion would appear out of nowhere and destroy him. Or even just end his turn while 1 or 2 spaces away from enemy territory. Sounds like a fun game to me.