There was probably no problem with the previous UI. Forgive me if there was. But if there was, keep it as an option that one can choose. Even better, keep two tabs, one for the previous, and one experimental. People might want to give feedbacks on experimental UIs. By the experimental tab
, I mean a Theme
tab. Users may choose one already made or customise one on their own.
By default, I would prefer the previous UI. It's looking just odd today!
Edit: The text here as it appears now in mobile devices resembles the one in desktop devices. I mean the colour was sort of yellowish earlier in mobile devices. I hated this change most.