I've been using Fences for a long time now and really love it, and like the addition of the folder portals in version 3. One thing that kinda bugs me about it though is that when I'm navigating deep inside a folder portal, navigating back out to the root of the folder portal can only be done by clicking the "back arrow" multiple times, and its position depends on the length of the folder name. So it requires me to reposition my mouse between every click. Here's a gif that demonstrates that - https://i.imgur.com/7Vsm1jB.gif
I wish you could make it so that the "back arrow" will stay at the same place, regardless of folder name length. Perhaps in the upper left corner.
Also, while writing this, I have thought about 2 more features I'd like to see in regard to folder portals:
1. Add support for folder portal navigation using the forward/back mouse buttons (i.e. these buttons - https://i.imgur.com/utPMKIN.jpg)
2. Have a "home" button in the corner of the folder portal which will reset the portal back to its root folder (kinda like shown in the right corner here - https://i.imgur.com/v5y6FdN.png)