I decided to do some work on fleshing out the troglodytes, since I'm not really interested in the ratmen.
D&D didn't have much to offer, other than that they're "vicious little lizardmen". Not very interesting. So, I did some research and some daydreaming, and decided they could be a race of cliff-dwellers that actually construct their homes along the sides of cliffs and chasms.
This was inspired by the architectural practices of the Pueblo people.
They probably wouldn't be capable of doing the kinds of advanced architecture our dwarfs utilize, but they *could* convert natural caves into actual buildings--smoothing stone, building short walls and doors on the fronts of the caves, etc.
That'd give them a good defensive positioning, as well as differentiate them from other species, while not giving them advanced tech, or making them enormously powerful.
Then I daydreamed some more and decided that maybe they're a society that's actually ruled over by some kind of undead (mummified?). The trogs are living, their upper political administration is not. This was inspired by the Bo society in China that lived along the Yellow River, in Yunnan and Sichuan, and hung their dead in coffins hundreds of feet up these vertical cliffs.
To tie the two together, I decided that the undead could actually be spiritual authorities, much more than political ones, with a religion influenced by the Kachina cult of the Hopis and Zunis, with the undead first worshipping (as priests), and then gradually becoming, the multitudinous "little gods" of the trogs.
The trogs themselves could have the technology base of an advanced neolithic society, and maybe do a limited trade for copper and other metals, which they might be able to cold-forge.
They might trade their skills as stone-knappers to our dwarfs, providing those obsidian scalpels that are all the rage. They might also do a profitable trade in lifestock, fish, spidersilk (woven or raw), mushrooms and mushroom alchohol, pharmaceutical and recreational drugs, and poisons (nobody knows the 'shrooms that grow in their territory like these guys). They could also be a good candidate for an underground species that uses bows, both for hunting and warfare (less risk to their undead rulers that way).
The undead influence, the static nature of their society, and their relatively indifferent attitude towards members of their society who are still living, could combine to keep them a particularly superstitious, backwards people, but not one without wisdom, or interest.