Agreed. SmartTiles (and Nest Manager and CoRE) provide a functionality that SmartThings hasn't been able to offer, so I'm not surprised that they pointed to you for backup functionality. I'm looking ahead to V6, so I'm not in a rush to go and fix my CSS.
That being said, @tonesto7 wasn't sure why Nest Manager Automations* got hit, as they don't use State. I'm leaving those automations alone as well, and haven't gotten around to rebuilding CoRE (busy week). Maybe somebody much smarter than myself can piece together what the root cause is.
*EDIT: a word