I'm impressed overall with Gabe as a content creator. She gives weekly updates without fail, and has adjusted her release schedule to be more reasonable (the previous goal was one episode per year, now it's closer to about a year and a half). I've also taken a look at a lot of the game's files and there's solid framework in there for stuff I assume won't be there until episode IV.
I think the largest bottleneck for Gabe tends to be the art commissions. In the past (I don't know about now) voice actors have also stymied progress. Patreon slowed progress down, but that's because she is able to afford more commissions, and those take time. If you look, you'll even notice most (if not all) of Sparrow's Trading Card art is colored by SweGabe. This is not to mention all the other little extras she has for Patreon users such as Cosplay shoots, videos, etc.
Most importantly though, I feel confident Gabe will finish her game. The amount of abandoned adult game projects is staggering, but she now has 4 releases to her name and a golden edition for two of them. It might end up being 2020 before we see Episode IV, but that still beats the "probably never" I often see. Even besides that, I can reasonably expect that after she releases Episode IV she'll probably go back and release a golden edition of the whole thing as well, polishing a bit more and adding some more extras.