343 Industries could halo infinite multiplayer include the upgraded weapons (Striker Sidekick, MA40 Longshot, …) from the campaign? Maybe allow players who have completed the campaign missions to select the upgraded weapons at the start of multiplayer matches?
I have often thought about this myself and find it odd that they’re not available in multiplayer. I don’t agree with using them at the start, however, unless they’re available for all players to use as that would put some at a disadvantage. The only time they should be available at the start is either in Action Sack or some limited gametype.