1. Melee attack should be more powerfuller (like in other games e.g. Halo)
2. A melee button (like < or sumthin)

I press <
I equip my third weapon; I take off one of my shoes and hold it aloft over head, ready to swing
I hop towards the enemy, whacking the crap out of them with my shoe.

Why would there need to be a melee button when you automatically hit your opponent if they are close enough?

powerfuller = not a word

grab a chainsaw. how would you want more power than an instant killer??

Melee has no range. Why bother using it when everyone else has guns?

As long as we're in the imrovements section...why has the chainsaw been changed so that you can only kill someone when you're standing directly on top of them?

because you touch yourself at night....

But seriously, what are you gonna do, sneak up behind them like in halo, kinda hard in 2d!