I know people have done this before, but here are my thoughts.
XP in MM is sometimes hard to get, and we gotta remember there are 600 levels on this game, so here are my thought on MM’s XP
Collecting a coin: 2XP->3XP
Collecting an Epic Coin: 10 XP
Collecting a Super Coin: 25 XP
Killing an Innocent: 15->20 XP
Murder elimination: 30-> 50 XP
Each time a player leaves the game, everyone gets 2 XP
If you are murderer, and an Innocent leaves the game, you keep 10 of their XP.
5 XP per 30 seconds would be kept unchanged.
Win: 0->5 XP
Murderer win: 60 XP
Innocent Coin Cap: 75
Murderer coin cap: 35
These XP changes apply for Non-Hive+/Ultimate players, boosts apply the same.