On the gender divide, in the wider scheme of things model company wise, GW actually comes out fairly well. Granted that's not saying very much!
None of their female models are especially sexualised. Witch Elves and DE Wyches? Yeah bit of flesh on show, but no dodgy 'WTF is wrong with her hips' type poses.
Still a lot of work to be done in that area, but a bit of diversity is better than no diversity.
As for racial representation - I guess it can be quite hard to sculpt anything other than a fairly generic face without it becoming a caricature. Cadians and Catachans for instance? Can be painted a range of skin colours, as the faces are pretty neutral. When you start to think about how features need to be exaggerated at such a small scale, you can see how a sculpt can go from racial to racist representation all too easily.