Agreed. It is "enough" to just have two templates, one male as we have now and one female. And then switch around color palettes for those. And if it works, the "hat"-hair could be switched around too for some more variety.
But on other hand I also understand the uniformity, to make easier to spot them.
My own wishlist is however not skin/hair color but rather the clothes colors. Be able to recolor for example the princess dress to pink&white to fit better one more "modern" princess style. Or make an army of princesses of different colors! Would be fantastic!

(inb4 princess peach and daisy colors

)
Likewise for Elly, Lockjaw and other similar dressed ones. As for Gulpee, Cosmic Cow, Tiki, Chief Beef .... I understand their "uniformity" to have for the brand tie in.