so far Opera starts to get usable again for me (with some add-ons). But there are still reasons, my wife cannot change from old Opera 12.17 version: She is disabled with her eyes (she can see still a spot with heavy zooming). In all older (12.xx) versions the Connection information at the left side of URL bar was good visible marked with background color, if the connection was normal, safe , etc. Now you can find only a small Padlock in that color, which is for such disabled persons not visible any more. Can you change that manner back to the old - good visible scheme ?
Second thing is the Bookmark bar. She needs only a few bookmarks, to be called as a list which was possible up to opera 12 (to search the whole screen for the suitable Favicon in the stash or fast choose page is very difficult for her).
In General : for vision-disabled people buttons in a always same specified position are much easier to find then in a dynamical environment. So the configurable Buttonbar/Menu again would be a great help.