"Export for screens" still has too many problems.

[#1]

"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.

[#2]

"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.

[#3 · Accepted solution]

Please post bugs & feature requests to http://illustrator.uservoice.com

Engineers don't see them in here.

You can click on the cogwheel to get some basic settings in the Export for screen dialog