Thoughts on weapon balance

I have been watching some Halo 5 gameplay, and noticed that the SMG rivals the Assault Rifle and seems to win in terms of damage, bullet spread/accuracy, and fire rate. The only aspect of the Assault Rifle that wins over the SMG is the weapon’s effective range. While the AR’s bullet spread/accuracy is better than the SMG’s, the SMG’s damage to spread ratio is too high. I think the SMG should receive a minor damage decrease so that the pros and cons are evenly split between both weapons.

SMG:
High rate of fire
Exeptionally large magazine size
Medium-High recoil
Low damage per bullet
Medium-High spread

Assault Rifle:
Medium rate of fire
Average magazine size (32)
Medium recoil
Medium damage per bullet
Medium spread