Hello Michael,
Thank you for your message.
these host are direct (connecting via local IP)
If you use direct connection the performance and speed should be near instant (real time). If upgrading to the new version caused such decrease in performance - especially when direct connection is used - we would have been reported that immediately including here on the forum.
Please, send us your Host logs for examination. Also, make sure that you upgraded the Viewer as well and restarted your remote Host PCs after the installation . If you cannot restart the entire Host PCs try restarting the Hosts only.
Hope that helps.