Having played a few campaigns now I was pondering on Heavies, are they essential or just a huge points sink?
An average gang with a two heavy load out will often go with Heavy Stubber & flamer. This is often the suggested load out on forums. Those two gang members with just those weapons come to 280 credits. Over a quarter of your gang in two models and that's without any other equipment.
I have run a gang without Heavies admittedly it was Scavvies and they can't take them... and I took two Scalies. But their lack of heavy weapons meant they were not used in the same way as heavies.
Heavies tend to be static and often make you protect them with at least one ganger or juve, so if you play a clever opponent they will simply avoid the heavies line of sight and render him useless.
They can be made more flexible by using Special weapons instead of Heavy weapons, but the loss of higher strength, multiple shots, huge range or a template can lead to them getting less exp.
In my current gang I have a Heavy with a Heavy Bolter and another with a Plasmagun. The HB heavy has earned far more exp than the PG heavy. But that is one of the things I was thinking, with all that exp on the heavy if you play a game with randomly chosen members, and don't get your heavy you can end up taking a kicking.
These are just some thoughts I was having what are your thoughts on heavies?