What would orcs be doing in space? Especially if you use them in SC2? I mean among 3 races... there's no place for them. Otherwise the way they correspond to each of the Terran units, the way they look in skin, equipment, etc. is 10/10.
Exception is the Orc Agent: You just used an elf head in green, the rest is orcish, how about thinner orcish arms for being a female and making an orc head female too? It is supposed to be ugly, orcs are ugly. For the Agent model: 5/10