I understand your position (and frustration). Please let me tell you few facts so you can understand mine.
AmiKit is being developed on WinUAE since 2002. That means it works on WinUAE where, in addition, it uses some special features it provides (like RabbitHole, dynamic hardfiles, etc.) that FS-UAE doesn't have. Once I decided to port AmiKit to Linux and Mac, I chose Wine simply because it allows to run AmiKit on the same WinUAE engine as on Windows. That means 100% compatibility across the platforms. That means, from a developer point of view, that I am maintaining only one instance of the AmiKit and then it automagically works on other platforms too. Otherwise I would have to maintain two or three different instances, each one running on different emulation engine, each one requiring different approach, different files, different updates, etc. That would require extra testing too, and much more of my time to manage everything, of course. If I was selling thousands, or at least hundreds of copies, maybe it would be worth - I could hire someone to maintain such port(s) or I could even quit my regular job and do it myself. But meanwhile, I am only a one man here, with two hands, one wife and one hobby project.
To make the long story short, given the arguments above, it's quite unlikely that I would release AmiKit XE for Mac based on a completely different emulation engine like FS-UAE. Don't get me wrong - it's just that my time is limited and I would rather spend it on AmiKit updates (which I actually do - I am working on a free 11.3 live update right now).
Hope you understand,
EDIT: AmiKit now supports macOS Catalina! https://www.amikit.amiga.sk/macwrapper