Imperial Guard
Change "Hotshot Lasguns" back to "Helguns" and increase their range to 24". The idea that a more powerful laser has a shorter range is just dumb.
Make Voxes available to Heavy Weapon Squads and Special Weapon Squads.
Make Commissars available for Veteran Squads.
Put Commissar Gaunt, Col. Corbec, Maj. Rawne, and Mad Larkin in as special characters.
Remove the laspistol and frag grenades from the Astropath's equipment. The blind guy shouldn't have a gun, let alone grenades!