Yeah but HHC, adding ANY other weapon would take away the defination of "B" n "G".
Unanchored BnG, sorry to say, is just too easy.
I mean you can't really win, keeping it the way it is I think is perfect, but larger scale doesn't, adding other weapons would make it a madhouse like you said.
I use to love BnG with 1 HHG on 10 turn delay, most average TuS BnGs last about 30 minutes, and each player taking around 100 shots, I think putting BnG the way it is, with 1 HHG on like 20 turn delay could be interesting, but it would have to be something similar like this, Can't start off with zooks nades petrols clusters etc, it'd defy the defination of BnG, but maybe after a certain amount of turns, introduce a couple of other weapons with limited supply, like, after 10 turns, give 1 petrol, after 15 turns give 3 clusters (as they don't do alot of damage, but could be could for a little push or something), after 20 turns, give a single 1 star powered HHG.
That would spice things up a bit, while keeping it balanced on grenade and zook.