I'll admit up front that I'm not too big on fluff knowledge and approached this far more from a crunch perspective. I really wanted to offer something the base races don't, that would provide interesting starting and building options, without feeling overpowered as a whole. While I don't have playtest data, I'd expect this roster to be tier 2.5 initially (they suffer from the same issues Slann do), and build up to 1.5 at higher TVs (complete lack of S access and only 6 G access, 4 of which lack hands still hurts, but lots of options).

As stated in the figure itself, it's definitely initially based on the two FUMBBL Slaanesh secret league rosters. Clicking the image will download the pdf.