I wished Opera used one unified UI over all systems but it would clash with the OS design language, so that's a no go.
The new Bottom row of icons is too big, it's good for usability but it gets in the way of browsing space.
Missing features: It's still in beta so keeping my fingers crossed.
Please add night reading mode, like the one in Opera mini beta on android or like uc browser.
Also the address bar - would be nice if the disappear when you scroll down and appear again when scrolling up like in chrome in android.
Tab switch view: Can you give us options like the one on android?
Stability: <thumbs up> really stable, I remember the first versions that crashed on start up but this one is usable now.