Looks great so far! Liked the rules regarding propulsion bonuses and dice-wise decisions for damage rules. Weapon types provide cogmind spirit, i feel like even more can be done to make them more unique.
How are you planning to implement movement? Will it cover rotate speed or being able to strafe, or any other shenanigans like being able to jump over midsize junk when playing as lightweight walker? Also I looked at robot samples and movement speed difference between Tier 2 and 3 looks ridiculous: T3 unaware get both more movement slots and better props, so for now T3 Battle Tank is moving x3 faster than T2 walker grunt
If only crash damage can be used to calculate ramming