I think the guns are a bit more varied than they appear in their stat description. I picked up a LMG with the same damage as my starter weapon and only a little bit faster fire rate and smaller bloom but it had an electricity symbol (but fired black goo?) and it does a LOT more damage it seems.
And having two weapons keeps the game from getting stale I think. My secondary is a rocket launcher that explodes and sends out like 5 grenades. I've got a perk that on an explosive kill I reload 30% of my current clip. So it allows me to spam rockets and as long as something dies I can keep spamming without reloading. There's all sorts of cool combinations like that you can make.



