I have a cool unit suggestion that is a massive orbital ship that is built by the launcher in multiple part that get formed together in orbit and this ship is an orbital unit factory that can move and create orbital units faster then the launcher but can't create it's own parts, also it has it's own defence of orbital guns so that it isn't just a sitting duck . I also have an other unit that digs a tunnel through the planet and then it becomes a transport from one side to the other a bit like in the film 'total recall' .