Toolbar options
This should really be in, I would like to re-arrange extension icons and/or hide them, remove the "home" button etc.

Removing default search engines
This is a deal breaker for me, there are 6 default search engines, each assigned to a letter.
Some of these letters I want/need to use with other (custom) search engines of my choosing, but I can't overwrite/change the default keywords, nor can I remove the default search engine occupying the keyword.

Further speed dial customization
I would like to be able to replace the image for each tile, as well as re-arrange them in a grid of my choosing, not left>right, top>bottom.

Hide the menu button in title bar
This could be an option to just integrate it into the toolbar (like in every other browser, even Chrome which you're based on).

As far customization goes, Opera is extremely limited. While I don't expect it to have the same features as Vivaldi (which would be my go-to browser if it weren't for the extreme amounts of bugs, crashes and performance issues), I'd like to see a bit more than the barren wasteland that is the settings currently implemented.

Guess I'm going back to Chrome. Good attempt though!