Are there any plans to update PRO up to speed with the new WPML? If I’m not mistaken It is about half a year since its support was added to PRO. But they had quite a few updates since then and it looks like they slow down the PRO dramatically and sometimes even causing issues with loading Cornerstone.
As of today the supported version of WPML is 3.9.3 which was released in the month of February 2018. I checked the WPML changelog and can see that the latest version of WPML is 4.0.5.
I would like to let you know that our developers are working to test the latest release. To make sure plugins are compatible every plugin update goes through compatibility testing. As of now I am not in a position to share the ETA but you can keep a track of changelog page for latest announcement.
I am not in the position to share details on the release date but as mentioned in previous reply, to keep updated with latest changes please keep an eye on changelog page.