I truly agree with all of the points you have mentioned here. Site speed is not satisfactory, support is not satisfactory. Bug fixes and feature requests get addressed slowly. Since there is no css support we have to rely on requesting feaures time and again. Features that could have been easily taken care by us otherwise through css. Yet feaures come out slowly, and when they do, they do so with number of bugs.
I really believe that EditorX is the future of Wix and that Wix should priotize that. But so as they say, “classic never goes out of style” Wix should put a little bit more efforts in improving the classic editor as well. I would say start with site speed improvements and screen responsiveness. Maybe the classic editor will forever remain to serve the less tech savvys, but WiX should atleast try to keep up with the market competition and not be in the risk of falling behind.
I am hopeful that things will turnaround for the good.