I've been tackling a homebrew solution to give vehicles and drones a playable tactical movement rate. I've looked back to 4th to get some ideas and played around with different mechanics and configurations involving Speed and Acceleration. Nothing really hit it on the nose.
Just now I had an idea while looking at the Movement power. Presume vehicles have a base movement rate dependant on their locomotion (air, ground, walker, etc). Next multiply that by it's Acceleration and treat Speed like Agility.
I haven't checked all vehicles for this yet, but I'd like your thoughts on this.