As the titel mention im asking my self for what reason do every special ability ( most 3rd and 4th ) have a cooldown ?
Why dont just use resources for special attacks like only heat or amunition or in the case of meele why not focus ?
Will it be to overpowered in some situation ? I dont think so ! Even if you can kill an chaos-spacemarin with penetrationshoot in two hits it doesnt mean you can go an a killstreak with it becaus it produces alot of heat and than you can't use your weapon at all for a short time !
Best example is the bolter ,the bolter have the explosiv round ability but it uses 3 bullets instead of one so you can aoe kill things very quickly but he sooner needs to be reload that balances the overuse of the ability.
I also think ( personal opinion ) that the cooldowns ( except the basic attack ratio ) on every special ability and additionally using resources is the reason why the most player think that the game would be to slow.