Granted the constraint that races should be somewhat specialized to one of the main combat archetypes (with particular civic specialties on the side, like "quirky mechanicals"), you can't have both gnomes AND halflings. One or the other.
Also, while I'm in a grumpy mood: the idea of females as frontline fighters is perfectly ridiculous. Female sneaky poisoner assassins maybe, female mages of course; but female frontline fighters or combat rogues? Get outta here. Any race that habitually puts its females on the front line is headed for extinction (although ofc you could get around this with non-mammalian sexual reproduction systems and extreme sexual diamorphism, and that might actually be quite interdasting).
I think speedy knife rogue females make sense enough to suspend disbelief, but I've always hated females in heavy armor or bastard sword type roles. You can pull it off with a lot of effort, I usually cite the chick in Game of Thrones as a decent example, but you need a beast of a woman to do it. Most RPGs put these pretty little things in heavy armor and call them tanks and it irritates the fuck out of me. This isn't just a mainstream Dragon Age thing either, as Codex incline game extraordinaire Pathfinder Kingmaker did the same thing.
Yeah Brienne of Tarth is an awesome character, and quite realistically drawn. But of course an extreme anomaly. There's like a handful of notable female fighters in history (Joan of Arc isn't one - the one I'm thinking of is actually a fairly rogueish archetype from the 19th century, forget her name, but she killed several men in duels, both pistols and fencing). I remember a program on UK tv about a prehistoric village where there had been a massacre and the archaeologists reckoned that the village's females had gone down fighting, and it's plausible that sort of thing might have happened in extremis, as a last resort.
Another interesting example is from the history of Taijiquan (Tai Chi). In Chen village, where the art's origins can be traced back to the 16th century, the Chen clan, which was locally known for sending its most skilled scions off to earn good money as caravan bodyguards (interestingly the weapon of choice for that sort of thing was halberd-type weapons), females were also trained in the art, and in the clan's historical lore, some reached a high level of skill. But by the end of the 18th century, after one of the clan patriarch's daughters had been killed in a fight, the clan decided that while females of the clan could still learn the art for health and general self-defense, they were no longer allowed to participate as actual fighters. The really interesting thing about this is that the so-called "internal" ("qi"-based) arts like Taijiquan rely less on muscle mass and momentum, and more on the integration of several factors, such as clever leverage, a trained method of transmitting the solidity of the ground to a point of contact, and a particular way of conditioning the body's "fascial web" using breathing practices; so actually it was (and is) something possible for females to excel in.
A side-gripe is that these kinds of "qi"-based skills have never been faithfully implemented in RPGs or CRPGs because they're thought of as quasi-magical, where actually they're just physical skills, albeit of a recondite kind. To be sure, the idea of "internal" arts had a quasi-magical connotation even in China and Japan, but that was just from the fact that high level skill can look "magical" to the layperson. But it's hard to think of how to actually realize "qi"-based skills in a CRPG. The fighting techniques are all mostly based around very close-range fighting, a cross between wrestling, judo and very short-range striking with extraordinarily high impulse, but all delivered in a relaxed way. (It's a little bit like the Bruce Lee "one inch punch" - although that's actually a different technique, but the impact on the observer is similar, it looks surprising because there's zero windup or obvious use of hips or anything like that.) Also, it should be noted that the barehand training was always just a foundation, the ultimate aim was melee weapons, and Taijiquan still preserves several weapons forms (sword, spear, halberd, mace, IIRC).
