you need to learn to handle heat Arghy. just tapping the cooland is enough to get you out of auto shut down and either chaining or only using 2 of the LPL's is enough to keep you going alot longer than firing all of them off. If you like beam based mech heat is there to keep you in check. Beam weapons are devastating in almost every way (no ammo, pin point dmg high accuracy, high dmg and with ER's long range) So they are kept balance with heat. Its the way its always been and will be.