It's been long since Opera got new major features. VPN, Ad-Block, Reborn sidebar... since then it's been stale~
Dark theme was part of Reborn - as was Snap (screenshot).
What features Opera needs? Is Opera far behind other browsers?
One thing is for sure: Opera runs much more smoother than Chrome. FF announces that FF runs 30% faster & smoother than Chrome. It's not hard to believe. Though Opera runs towards that procent % faster than Chrome too.
What features you'd want to see in Opera? And why? Go further - be elaborate if you will.
What I'd want to hear and read is a bit of long term & short term roadmap of Opera development.
Feature & functionality wise.
Tab stacking might be somewhere in the future (depends much of Chromium/consortium) - but surely some enhanced functionality & new feature hashment should be coming to Opera's way?