MCC is gorgeous. The progression and seasons are gorgeous. Oh, you mean I have actual statistics in MCC? Wow… let me check my K/D on infinite… Oh, there isn’t one.
Okay… Well, let me check my win/loss… oh. Can’t see that either. Wow. Well, I’m just gonna play a few matches to rank up. Oh, there is no universal rank and my battle pass progression relies on me getting an over kill while sitting upside down and holding the controller backwards with a plasma pistol. Okay.
Hey, but great job, 343. 
I have been critical of MCC and 343 in the past but like you pointed out they got the match composer right and the challenges and challenge difficulty right in MCC. The seasonal points system was a bit grindy at times but not something that was out of reach if you kept up with the challenges.
It takes me 4 to 6 hours a week to the mcc pvp and pve challenges in MCC. It took me about 12 hours to do the weekly and ultimate challenge this week in infinite. I think there needs to a 50 exp daily challenge for winning a match in infinite in addition to the completion exp. They also need to allow us to have the entire or most of the challenge deck open at one time (like MCC) does. The infinite progression and ultimate challenge systems are designed to have ppl play the game 12+ hours a week plus the microtransactions. I love how in mcc you can work and buy everything you want with the season points that you earn. You also can’t buy your way through progression in MCC either.