Negating the benefit of Universal Print, keeping us in the state of being dependent on and trusting printer specific apps and services.
Btw, Google Cloud Print is deprecated, and competitors like PrinterLogic, PaperCut, and Lexmark's do offer more robust and generic "one app for all your printers" experiences.
If/When Microsoft does the lift to make those features a fully integrated part of InTune, that will allow them to make the sales pitch of Microsoft Universal Print being truly universal for anything they have their MDM hooks into.
In the meantime, though, enterprises that use Universal Print need a basic print button in the iOS and Android mobile apps to plug the gap between them and the mobile web user experience.
But yeah, the end goal should be true universality for Universal Print on all UEM-managed devices.