Hey there.
I think it’s a bit too hard to see a friend note in the mobile app friends list and chats. I set friend notes on people so I don’t forget who they are, but when they’re online or in a chat it requires a couple of taps to see the friend note. It’d be nice if it just showed up by their name, or at least immediately in the tap-on-their-name menu.
Also, it would be cool if I could provide feedback directly within the app, without posting a whole forum thread for it 
Safe travels!