This is a supplement to somethings I had said on the SA forums re: treads.
I am now not so sure that treads are in dire need of any buffs. Last night I got to Access, -3 on a pure combat run and used treads for the latter half of the run. I think treads are not a great idea in the early game, since you're still scrambling to get your build and can't hold your own in sustained firefights. However, once you hit storage/factory and get some real weapons you can stand and fight; as such, the need to run goes down. A tread reliant build can get away with only 2 propulsion slots, freeing more slots up for utilities and weapons. And since combat in this game is about 95% ranged, the slow movement isn't really a huge deal. Sure, once you're in a fight you're committed to that fight - but the same is more or less true with legs.
So I'm pretty sure I jumped the gun in saying treads really need a buff relative to the other propulsion systems. However, since combat is inherently harder than stealth/speed runs, I wouldn't complain if treads were buffed all the same