Cool, good to hear.
So taking you at face value, here are some of my thoughts about cleaning up the overabundance of slave traits.
Some of them are on the 0-100 scale, while others use a split gradient where the neutral value is 50. I think there are a few that could be simplified and combined, so that you had way fewer stats to worry about.
I've been thinking about this for a couple of days and something just occurred to me that might make some of your analysis moot: this sort of eliminating and combining stats is the sort of thing that tends to break saves when implemented and GD has stated he wants to avoid that.
That being said I do see some good ideas for tweaking a little, I would like to see some sort of 'exhibitionist' trait or stat and some way of doing something about the 'Shy' trait. It just so happens that lately pretty much all of my Starlets are also getting the 'Shy' trait which makes Starlet useless in the current game. I also think there's something to be said for having core binary traits that cannot be easily changed, which is what 'Shy' currently amounts to, I just don't like it being that one in particular as I think shyness is indeed something that can be more easily overcome.
I do like how you can currently 'stack' some traits, thus I'd rather he kept both Brawler and Warrioress, even when it works against you sometimes with Feminist and Advocate. They are all subtly different and offer a more nuanced and diverse take on a slavegirls personality and effectiveness.
Some skills are in place for future expansion I believe. While there's currently only limited use for Dancing, Performance and Acrobatics (Golden Dragon and selling to Dockside Tavern) I think GD has more planned that will utilize those stats.
I like the differentiation between Gardening and Domestic, the former can be 'trained' by having her do it at the house and/or at the Academy, and has a notable impact outside the perks and Influence a high Domestic skill provides.
Science skill is also used in hacking the vault doors and when using the machines to break down merchandise. If he progresses as I suspect he will it may well come into more use when slaves can help you with your burgeoning pile of plundered merchandise.
Survival skill is used for determining your effectiveness Hunting and Fishing. I've not done that in a while but I recall having Juno around was beneficial to that and she (and others) would gain Survival score when accompanying the MC.
Dexterity when high enough allows you to start in the advanced position and also helps determine your ability to dodge melee blows. Strength significantly improves damage done. Base attributes do affect combat skills currently, but perhaps could do more like increase your chances of improving the skill when training.
I appreciate all the time and work your put into your analysis!