Good to have you here! Interesting timing - one of our goals for the next release is to improve GIF export.
Here's what I get when I export with Hype 3.5.5 (391KB):
I wouldn't say it looks to bad to me compared to the original? Can you describe what parts are low quality?
As a teaser,here's the output in the upcoming version of Hype (298 KB):
I don't really see a big difference, but at least it is smaller.
It does occur to me that if you're on a retina screen, you should note that the GIF export is at @1x. If you wanted a retina GIF, you can double the pixel size in the export save panel. Here's what that looks like (595 KB):
I'm happy to add you to the beta if you're interested.