Is there any point to creating light, fast units? I realise they travel the path quicker and are thus exposed to damage for a shorter period of time (if not in a traffic jam). Are faster, smaller units harder to hit depending on the size of the turret shooting at them? A bit like EVE Online’s turret / ship sig formula thing, I guess (if you’re not familiar with that, nevermind).
yes, faster units are harder to hit. Each weapon has a tracking speed, and that tracking speed is used in combination with the unit speed to determine if a shot will hit or not.
Fast units are also an effective way at pulling 3-400 VPs on multi-path maps where you’ve been forcing the defence to stack on a subset of the paths, or where you’ve been pushing heavy armour and the defence can’t cope with shields (or vice verse).