The thing about MakeHuman is that although the meshes provided are quite bad, they can be used as a base for further improvement. If you check the official gallery on the site, you can see some pretty high quality work. http://www.makehuman.org/gallery
Most of it is done by taking the base mesh provided by MakeHuman into a sculpting tool such as Zbrush, and then continuing to add details to the mesh as well as paint higher quality textures onto it. You could also re-topologise the model to make it more suitable for your game engine if you so wish.
I actually did something similar for a part of my masters thesis. One section of my thesis involved producing a shader in UDK to emulate Fable 2's concept art. I didn't have the time to model a suitable test mesh, so I instead got a basic base from MakeHuman, took it into Zbrush, sculpted the hell out of it, polypainted it, and then exported the mesh and subsequent diffuse/normal textures. Managed to get a decent result in little time, and thanks to the Creative Commons 0 license I can use the final mesh however I want.
Considering you already have a base mesh you use for all the female characters, I honestly can't see you using it unless you were feeling really experimental. That said, you could use it to help create the male player models (now that I think about it, are there any mirrors in the game? I don't recall seeing any in the gym).