Just one more functional issue for now @eirannejad: While trying to work around the font issues raised in my original post above (e.g. how text now renders less legible and that keywords are not bold) I noticed that one cannot set font variations in the new editor. For instance, in GHPython one can select Cascadia Code Light and the editor uses this font, while the new editor does not enable this:
Also again note the font size discrepancy, where a size 9 in the old editor looks like 12 in the new one.