Why wasn't Heavy Thrust merged into Impulse Drive?

[Khel]

The whole point of Heavy Thrust is to give you something necessary to do that's outside of your normal combos. If the damage boost effect was moved into Impulse Drive, you wouldn't even need to pay attention to the buff - it'd just always be up, simply by doing what you'd normally be doing anyway. Heavy Thrust is separate from your DPS combo specifically so that you have to pay attention to your buff, and work a Heavy Thrust into your rotation when that buff starts to run low.

Everyone uses it as part of the combo, you don't monitor the buff You use it prior to impulse drive when you are running your two combos and it is always up. Really does not add nothing but an extra button to the DRG "utility" combo.

Does not bother me, but I can see why they kept it. I don't think other melees have a buff or debuff on their first combo skill (I could be wrong). That leaves out Impulse Drive and of course Disembowel and Chaos already have their effects. Pushing it to the DPS combo, to like Vorpal would be bad for the class.