Simply, Infinite would benefit from additional weapons form past Halo titles and even new Banished weapons.
When playing Fiesta, Seeing the standered weapons that are avalible puts a minor damper on the experiance in this mode. For me, I would like to use other weapons to switch up my playstyle and play in different ways rather than pray that I dont get the Pulse Carbine.
Other modes would benifet from this as well.
For example,
I would like more close quarter weapons like the SMG and/or a plasma rifle. Return of the classic shotgun?
The AR could also use competition with a similer style weapon (other than the commando) like the plasma repeater or even a new banished AR style weapon.
For mid to long range, we have some pretty good options with the BR75, Stalker, and the Shock rifle. but adding more varaity would be welcomed for me (like the DMR ,Covenent Carbine, or even the Needler Rifle)
Power weapons like the Fuel Rod Cannon,Spartan Laser,SAW, would be my top picks for a return, but also another new Banished power weapon would be cool.
I would welcome a new weapon(s) and would be perfect for a drop pod release in the future.