Increasing passive cannon damage for bigger tanks

[bangyouredead]

I was just thinking about how all tanks have the passive cannon ability, besides titan i believe, and how it does the same amount of damage, whether its an 800 gold tank or an infernal. Anyone think this should be changed? With every other ability, the more expensive the tank the better the abilities get, except for one ability which always remains the same (cannon damage). Seems reasonable to me to increase the damage or speed of the cannon for each tank as the price of the tank increases. For larger tanks, especially infernal or sky fortress, it doesnt make much sense to even level up the cannon, as it does such little damage at later stages in the game, and results in a waste of a good spot for a better ability. If the damage was upped, maybe people would choose this ability sometimes instead of ignoring it...p.s. how do i make a poll???