I think this is almost an entirely horrible idea because that would make the chomper horribly over powered. I have seen, myself included chompers decimate the zombies team when played smart. Increasing damage per bite to 40-50 is a terrible idea because his attack is naturally fast and can dish out damage easy and quick. Increasing the bite chomper damage would mean increasing the spray chomper damage which is already powerful. Then take into account the metal chomper. Should he be doing 65-75 damage? No.
I dont think he should take less damage or be invulnerable because it nearly removes the need to be very strategic with the chomper. You need to choose when you should swallow or bite to death.
Chomp Cannon does 100 damage right in the face and 40-50 in splash damage so that is plenty awesome when you know how to aim it.
Health is perfectly fine.
Good is meant to hold, its a utility not a damage attack.
The only think I agree with is being gooped should decrease swallow speed, but only for purple good, not super sticky. Also, only imps should be swallowed extremely quickly.
Chompers are assassins, be sneaky and pick your targets. I normally stalk the respawns the best I can forcing them to focus on me and dodging between all obstacles.