The challenges simply aren’t broad enough. I compared some of them to MCC and MCC let’s players tackle challenges in many ways that usually accounts for their preferred playstyle.
“Objective Results” you earn progress in any of 9 different modes (CTF, Oddball, Assault, Infection, Juggernaut, KOTH, Extraction, Dominion, VIP, and Territories). This GREATLY eliminates the RNG aspect of matchmaking.
Getting precision weapon kills lets you do that with the (BR, DMR, Carbine, Magnum, AutoMag, Light Rifle, Sniper, Beam Rifle, Binary Rifle, etc). Again this lets players use the weapons they want and doesn’t force them to fight over spawns.
Apply this to Infinite. Say the challenge is “Get 50 kills with small arms weapons”. Basing this off of the rotating weapon pads, a “small arms weapon” would be the Sidekick, Mangler, Plasma pistol, or the Disruptor.
Heck if they want player to try out new weapons, make a challenge called “The New Kids” or something and have it say, “Get 50 kills with Halo’s newest Arsenal” (Sidekick, Mangler, Disruptor, Shock Rifle, Skewer, Pulse Carbine, Stalker Rifle, Heatwave, etc). At least one of those is gonna spawn on a map, and player get to learn new guns that they may not have given a chance.