I rarely ever used anything except the machine gun or shotgun in the first, and the wrench was the best weapon in the game anyway.
I don't mind two-weapon limits, so long as they either -
[ul][li]Provide you with the ammo you need[/li]
or
[li]Provide you with alternate weapons around in an area where you might run out of ammo.[/li][/ul]
I think it could be neat to maybe need to scavenge to find a weapon with ammo while you're being pummeled around. Don't know if that's anything they do, since I won't be getting the game until later tonight, but even if it's not I've never had a problem with two-weapon limits in other shooters. It only ever feels stifling in situations like Borderlands where they put a bunch of weird, unique effects on guns like scatterwave shotguns or heavy repeater pistols that fire exploding needles.