Answered
"Export for screens" still has too many problems.
"Export for screens" is a great feature in general but it has quite a few flaws and still has a lot of room for improvement.
- The quality of the JPG is really bad and it generates worse quality file and bigger sizes than "Save for web", for example.
- It adds the suffix "-1" when exporting artboards, even if you have the field for "suffixes" empty.
- You cannot adjust the quality of the JPG
- You cannot add custom presets.