I love the new SMG, it's very amazing in close-range combat, but I do have one gripe:

When you switch guns, it kills you.

What I think would be best is that you pull the gun in, wait two seconds, and pull the new one out, just like reloading the gun.

It would be very useful.

Ah... but this isn't Call of Duty.

More specifically, not even the very most special of special forces usually carry both a rifle AND an SMG. The US Navy SEALS use both the M4 and the MP5 fairly commonly, but generally not both at the same time by the same SEAL. Typical troops have a rifle, and a few people in their company (generally NCOs) carry an SMG or LMG INSTEAD of the rifle, not WITH the rifle.

That's the way it's been for a long time, and that's the way it will likely remain for a long time. Rifle OR SMG. Pick one.

We can carry fifty blocks, a spade, a pickaxe, a riffle, and some grenades, so why couldn't we fit an extra gun?

(Also I've never played Call of Duty)

It should be that when u choose a gun you respawn with it the next time you die

...or you could just wait until you die and pick then. You'd have a better idea what was needed by then, anyway.

which is exaclty what i said. I said that but not in detail. SO let me rephrase it. ok so you see that the enemy is advancing. You wanna have the rifle but you know that if you switch now you die. SO why not make it that when you switch weapons you respawn with the one that you chose the next time you respawn.

also...now we got a SMG.

Or you could go back to your tent, and change guns.