I'm able to confirm that this appears to be resolved for us as well
 
iOS devices which had been enrolled prior to today are now sending and receiving updates from Meraki
the Meraki SM application now is confirming enrollment status correctly
the ~40 iPads we're setting up at the moment all seem to be taking the Management profile
 
Thanks everyone!
 
Edit: Still have one iPad that is giving us the SCEP server returned an invalid response error....