This is a very interesting change – my knee-jerk reaction would be that this would break most of our game’s existing UI.
Currently, we heavily use UIScale and AutomaticSize in our UI workflow; however, as per my various, different, bug reports, it unfortunately has broken a lot of our text UI.
To remedy this, we’re forced to manually calculate the text bounds with TextService – which is not ideal, since it wouldn’t mesh well with this setting!
it’ll require significantly more effort on our end to support this change, which is a bummer since we’re focusing our utmost on releasing our game. Having this change mess with our UI would be a huge issue, and so we’d appreciate it if the aforementioned bugs could be fixed first before moving on with the studio beta 
If the UIScale bugs were to be addressed, it would be a lot easier for us to use AutomaticSize instead of calculating the text bounds manually everywhere, and thus support this change more easily!