Indeed, but that fast regen only brings them up 2 a lowly 25 HP. Considering their money value and the strength of the basic rifle, they should be able to regen at 2HP/sec OFF of creep without causing imbalance.
You're a dretch, just go die fighting. If you're really that worried about feeding, you can go back to your base for a while, or walk around the map to an alternate attack route. Or find a basilisk.
They are worth too much.
If they are, it's not to a degree that is imbalancing the game. Aliens still win
15% more games than humans, and changing the base classes -- even a little -- would have a major impact on the game. In fact, in games ending with both teams at stage 1, aliens do much, much better as the player count increases, and I really can't believe that this happens in
spite of dretches feeding too much.