For solve EW their problems with Play3, they need to connect to this problems guys from NI..:-) I hope they are sure that can solve these problems on their own.
About slow load. This is due to the fact that the host sends to VE once a lot of signals about load. I think this bug VE, yes. Try to load the VE instance from the host in one - load is instantaneous... But if you just load the next level (second instance) - everything can all hang...