Sorry if I got you wrong. But I keep seeing this: ppl thinking HS and Cleave are on-next attacks. I'm 100% sure they are not. Just abilities, not on GCD with 3 sec cd atm. Go check it if you dont trust me.
At least with a 1.4s tanking weapon I could queue up Heroic Strike with on-next mechanics and not have to spam the button constantly. With its own special GCD, I have to mash the button constantly to avoid losing out on cooldown time. (I'm not sure the new queue works for the Heroic Strike/Maul/etc. GCD either? At least I haven't noticed that it does.)