Man, I like KSP fine without combat and everything, but a game like that video would make me so hard. Like a craft-design and physics-driven battlezone.
Mods can't fix KSP's janky physx-powered physics, or the 2.5km scene distance limit, or the dull terrain, or the 1-active-craft limit, or lack of network code, or the way .craft files have to use a very simple organisational thing (I think it's a tree? so no proper bicouplers basically). There's Scraps and A New Zero and some other stuff, but they aren't what that video fills me with desire for.
Imagine a game that combines commanders from PA/TA/Supcom with minecraft open-world/building and KSP physics. You play as a commander(in 1st/3rd person) and nanolathe custom designed robots/machines and roam around planets/solar systems/galaxies doing whatever you want.
Well, there's Dysis, which ticks quite the TA/minecraft/1st and 3rd person and nanolathe boxes. Sadly no KSP physics. http://tumblr.dysis.net/
Dude you know what? it should totally be in the units suggestion thread. you can go post there, you had the idea first. here's something to show it off: Code: https://dl.dropboxusercontent.com/u/22720750/beam.gif here it is in action :