Can't see why either of those ideas couldn't be a thing. It could be an emergency response, too. Get ejected from your mech before it is...teleported?...back to the garage, while you shoot up in the air and deploy some wings to fly back. Because maybe they can't teleport organic matter, so they couldn't just pop you back to base. But, then...it would be faster and more safe with our mechs. Sure, they're a bigger target, but we're downright squishy. And squashy.