So I know its early days but I thought I'd start a thread about balance and specifically Heavy weapons as I've used those the most. These are my findings/thoughts so far.
The Plasma Cannon is by far the go to weapon, good damage and range of abilities, with a powerful single shot that recycles pretty quickly, good bust fire and 2 AoE with the multi shot AoE being much better than the single shot one.
Heavy bolter is Meh, with the '1 + 2' abilities being pretty underwhelming, the ability that lets you withdraw while firing is OK but you might as well just stand your ground and blast away. The primary fire is good for close in but I mainly use the secondary as its more accurate. Ammo level is good but I think the primary fire could do with a tighter cone of fire.
Multi Melta has some good abilities with the exception of the 'anti armour' shot, which seams to have no effect. Unfortunately it overheats far to quickly compared to the amount of damage it puts out. If it did 20% more damage, then I think the overheat time would be more justified (this might make it too powerful but you have to try these things).
What do the rest of you guys think ? I've just picked up the Heavy Flamer so I'm going to pair that with the Plasma Cannon and see how I get on. All in all, loving the game so far !