Mercs get free parking and are virtually immune to leprosy. Powertechs get free icecream and have better insurance rates. They are pretty much the same otherwise.
Please, please do so. Getting this upset over bugs is a clear indicator you simply aren't mature enough to play a MMO. Goodbye, make sure to follow through here.
Okay, you are clearly wrong. He should have said interrupts and locks out the ability. Putting an ability on cool down that didn't have one would do nothing. You can keep claiming otherwise though if it makes you feel better.
No, heat signatures are used to guide missiles which are the cornerstone of the Arsenal Merc. The "Heat" has very little to do with fire. You seem to be working with the same flawed set of data that the OP is using.