The idea that you could just breeze through multiple attacks with multiple Skyrangers seems off to me. If I have three Skyrangers and can thus confront three attacks, that demands a hell of a lot of troops. Eighteen just to fill the ships. There will be losses, short term through injury, not to mention three times more deaths. A greater number of rookies will have to go into service, much more high end equipment will need to be built, instead of having a single very powerful team you'll have to spread resources much, much thinner. I think it would make the business of putting a combat effective team into the field much harder than it is now. It would also make SHIV units actually useful.