These all look -really- cool. However, they also look -really- unwieldy. Like... If it's going to be held the way the silhouettes hold them? I just can't imagine that. If it's held the way the ingame example is holding it, sort of out to the side like a keyblade [someone else mentioned it and now I can't unsee :D] then it's ... Okay. It'll work. But not for the longer designs, and some of the heavier ideas would need two hands unless they're made of styrofoam.
Held over-hand, like a javelin [not lance!] you would want a stabbity weapon. A lot of the designs are stabby, but unless a character uses a second hand, that's all they'll be. And that stabbity will be weak. Held to the side, like a sword [still not a lance!], you could use a lot of the more elaborate designs, but they'd need to be relatively short to avoid venturing into two-handed sword territory.
Venturing into lance territory would see a heavy handle, with maybe some counterweight to the back. But it would need to be held underhand, and again it'd be nothing but stabby. So really, what you're looking for is a short-sword type of fighting. Overhand doesn't work, no matter how cool those silhouettes look.
There's a design on the very first image, second and third from the bottom, that would make a neat sort of one-handed lance design if it was attached around the upper arm near the base. imo explore that idea if you want to try for something that's unique and not-a-sword, and I think you'd even be able to call it a lance if you wanted to, then.
The question really becomes whether or not the first silhouettes are the way the characters are going to hold them, cuz you've said that you like the over-the-shoulder look, or the mock-up 3D model. Because if it's the former, these just give me the 'haha no that's not how weapons work' feel. These guys have pretty big forearms, but I want y'all to pick up a broom and run around holding it over your shoulder like that by the end of the handle and when you're done let me know if you think you can stab something with it.
tl;dr: swords. what you're making here are swords. unless you're using the first silhouettes, then what you're making are silly.