Where is the documentation, now that you mention it? I wanted to install it because it looks on paper to be useful. I was pleased to discover that dispcalgui has a profile inspector and what looks like a gamut comparator, and it opened my display profile by default. I'm not happy with ColorSync Utilities. For instance it tries to tell me that my display gamut is larger than AdobeRGB, even Dell wouldn't try to tell me that.
I take that Mr Gill is the developer and is touchy about geekiness. I spent a thousand years of my life being a hardware/software integration engineer among other things, and I am quite familiar with software developers and their quirks. When I encountered a problem, I would explain it to a guy we called "No Op", because that was almost without exception, his fix.
Our typical problems were, factor of two, polarity, no default, input or output out of range, global/local variable confusion, overflows, machine language subroutines, and modes not locked against transients. So I don't need attitude. But I applaud the hard work that has gone into this app.