In terms of the music section, I have a couple of ideas for Suggestions
Latest Music - Can we have this open in it's own page so instead of just scrolling left and right it will act like favourite songs and open up it's own page so we can see more of what's added in terms of latest music. I add a ton of albums often and there is only so many you can see when scrolling right before it cuts off.
Recently Played - Just like the favourite songs it's own page i can view a lot more recently played and go back further than just scrolling left and right
Frequently played - You guessed it, it's own page so i can see a lot more frequently played music
Favourite albums - This would be great to see my top 20/40/50/100 albums that i go to often so i don't have to go searching when it doesn't show up in frequently or recently played.
Random Album - A way you can ask Emby to pick a random album out of your huge collection and play it for you, would work well for me having thousands of album some i don't often play so would be nice to just let Emby decide an album for me.