Examples?
Trapper doesn’t wear armour, is maniac type - fine.
Sniper doesn’t wear armour, is unarmoured type - fine.
Dreg Flamer doesn’t wear armour, is maniac type - fine.
Burster doesn’t wear armour, is maniac type - fine.
So which ones am I missing?
As I suggested in the original bug report post, we also have the bomber, who is lumped together with the other maniac specialists, as I think you gesture toward, but is correctly set as flak-armoured instead of maniac damage location type. This would tend to support my interpretation more than it does yours.
Correction: the scab trapper appears to wear more or less the same armour coverage as the bomber, but while one is marked as flak armoured all over (which in itself is wrong - arms and upper legs and head clearly should be set to unarmoured/maniac), the other one is marked as maniac all over. Similarly with the scab flamer, it’s marked as maniac all over in spite of it clearly sporting a few flak armoured locations.
With that in mind here are some more correct damage location types for the three specialists in question:
Bomber
Head - Unarmoured or Maniac
Chest - Flak Armour
Hands - Unarmoured or Maniac
Haunch - Unarmoured or Maniac
Shoulder - Flak Armour
Lower Legs - Flak Armour
Upper Legs - Unarmoured or Maniac
Trapper
Head - Unarmoured or Maniac
Chest - Flak Armour
Hands - Unarmoured or Maniac
Haunch - Unarmoured or Maniac
Shoulder - Flak Armour
Lower Legs - Flak Armour
Upper Legs - Unarmoured or Maniac
Scab Flamer
Head - Flak Armour
Chest - Flak Armour
Hands - Flak Armour
Haunch - Unarmoured or Maniac
Shoulder - Flak Armour
Lower Legs - Flak Armour
Upper Legs - Unarmoured or Maniac
I’ll point out that other specialists like gunners or maulers do have more nuanced damage locations set for them. It’s the maniac specialists that appear to have had their damage locations carelessly bucket-filled with a single type, possibly by an intern or someone in a rush, instead of set with reference to the actual character model.
The question we need to ask is what kind of enemy does the maniac damage type represent. Does it include the regular traitor guardsmen specialists, or is it meant to represent roided up freaks like the mutant and rager and such.
If the latter, I would argue that the three scab specialists under discussion, the bomber, trapper, and flamer, should more properly have their unarmoured damage locations set to Unarmoured type, like the scab sniper. If this makes them too easy to kill, the solution couldn’t be simpler - raise their hp values. If the former, setting their unarmoured damage locations to Maniac type would seem to be more appropriate.