I could see having an upgradeable melee attack, but devoting a third weapon slot unto itself? I'm more with Euphorious. Having a dedicated melee weapon slot is pointless, especially if I have a shotgun in one of the primary slots. If you open up slot 3 to even a limited range of weapons (I understand you're not, just saying hypothetically) you open up the probability of abuse. I have that problem with Borderlands. I'm [i]too[/i] prepared with four equipped weapons and an inventory full of situational (read: every elemental variety) weapons of each class (sniper/revolver, rifles, SMGs/repeaters, shotguns). Halo's model was better. It forced higher tactical awareness, forced people into more specialized roles depending on the weapons they carried, and forced players to work together more to succeed. If you let everyone carry too many weapons, people will lone-wolf more since they are more self-sufficient and that's not the direction Bungie's been trending in recent years. Bungie's been more teamwork and cooperation focused, and carrying more than two weapons would defeat the purpose.