This is very interesting, I’ll definitely be keeping an eye on this project. I haven’t been on this forum for several months, so looks like i’ve missed a lot 
I’ve wanted to have a try at creating my own RTS game using UE4, particularly a remake of one of my favorite games from the late 90s, Jeff Wayne’s The War of The Worlds, but I had no idea where to begin, I still don’t, not really a programmer, (and I know of no way to ask Jeff for his permission to use his music or the model designs). I’m primarily a modeller with several years worth of experience with 3ds max (using student versions), but the models have all be static, unrigged (though i have done one or two basic animations in my time). I’ll soon be migrating to a full commercial version of Maya, as Blender gives me a headache, and the Foundry’s licensing policies regarding transferring across workstations (if i need to upgrade my system ect) seems a bit…convoluted, so i decided to go with Maya, as that has the better rigging tools, and once i’ve got the commercial license, I’ll be free to release anything i make online (AD’s view on assets created with PLE versions of their software are that they can not distributed).
Anyways, like i said, once I get up to speed with Maya, I’ll gladly make and donate models for the project.
What poly count should I aim for? I’m guessing from the early screenshots, you used the top-down template as a base to work from?