Two suggestions regarding HWP's
1. They should have an inventory screen. Of course they should not be able to pick up items, but one can imagine that they have an automatic ammo loading mechanism, which let you choose which ammo to load. For example the rocket HWP could have different kinds of rockets and in the inventory screen you could load the rocket type you want.
2. HWP'S should have a chance to explode when they die, similar to a cyberdisc. But the cyberdisc explosion is too strong and happens always when they die (I know, when you hit them with an HE Weapon, they don't explode, but this I consider a bug, because it makes absolutely no sense at all)
So it would be nice, if one can define an "explosion strength/blastradius" and "explosion chance" for dying vehicles in the ruleset file.