I exported a variable font with Glyphs3, and build the same font on fontmake.
I ran both fonts trough fontbakery to compare the quality, and they are similar.
The Glyph version even had two Fails less. It seems too be ok, with all the necessary tables, etc.
So why is the export on G3 still beta, is there anything that you are still working on to make it final?
Second question: if fonts have no manual hinting they are exported with no hinting, right? Are there any chances in the future for ttfautohint to work on variable fonts?
The missing hinting its the only thing that prevents from shipping variable fonts.
ttfautohint does a nice job on static fonts.