So, after looking at all the minis and hitting my Mwangi Expanse book to remind myself who a few of them are, here's my thoughts... Generally really nice sculpts and paint jobs, some of them are stunning (Black Heron, Taralu Dwarf, High Sun Mage Oyamba, Senghor Priest, Thabsing Blood-Eye, Goloma, Anwigasi), a few are really thin so they bend too easily (Andai humanoid form, Shisk), amazing for a Mwangi Expanse campaign, a few are a bit niche for a non-Mwangi Expanse campaign, but that's fine, that's true of every themed set.
But looking back at the book, there is some of the most beautiful character artwork yet and I'm a little sad that more of the NPCs didn't make it into the set. I know, sets are generally more critter-heavy, but the people in this book are just fantastic. I also buy the Wizkids D&D sets and they've started doing something interesting over there. For each set, they seem to be doing the big collection of randomized minis, which tend to be critter heavy, with "rares" being mostly unique monsters and bosses. "People" tend to generic folks you might meet a lot of, like guards, soldiers, etc., and some named characters who could double as generic en masse. But then they also sell a separate visible box (yes, it's a money-grab, I know) with named NPCs, so you can a) get more unique people, and b) make sure you get all the big names in one place if you're playing the adventure. Paizo is kind of experimenting with this with the upcoming Runelords set. I know it would end up costing more, but I would totally buy a Mwangi Expanse NPC box set that had more of the fantastic and diverse characters from the book art, or that had Old Mage Jatembe and the Ten Magic Warriors. Same with other sets; I'd be happy with a case of monsters and generic folks and a separate box with all the key NPCs. (This might also help with the phenomena of getting 4 copies of King Whoever because someone at Wizkids decided he should be "common.")
Anyway, just a thought.