Do you not think it takes a long time yo load in artwork and stuff from the stadia app surely it would be a good idea for this to be cached on your local devices so it loads up in seconds not minutes
I've honestly never had an issue with the length of time it takes to load or navigate the Stadia UI either in the app or on the Chromecast.
The TV UI is in need of an overhaul though. Horizontal scrolling through dozens of games gets tedious. I'm hoping the launch of an app for Android/Google TV puts a much better interface front and center on the biggest screen in the house. The web UI is a good start.
The library loads fine on the chromecast ultra i know the google tv one isnt supported yet but it takes a good 10 minutes just to load in the artwork same as my mobile phone my friend has the exect same problem maybe its just our location but im only 7 hops to the stadia website when i trace the route and have a 150mbps internet connection