Yep, I would hate to see the storm of messes caused by an auction house with the current server's stability. Though I have no doubt that eventually the servers will run smooth without hiccups the further PRO gets into development and out of beta, and after that the Pokemon auction house would be extremely cool to work with.
I've already noticed a huge increase in server stability in the past few months, I attempted to try out PRO awhile back after a streamer promoted it and it was just impossible. Though now I can usually play for hours without much hiccups.