Love the random map idea (like Ganner it seemed like I'd get on for two hours two nights a week and always play the same 5-10 maps).
Also I think 3 point score is too low. 4 seemed fine to me (7 rounds total on a map, but usually only was 5-6 tops). Potentially only playing 3 rounds on a map would be too quick.
Not sure where you're going (insinuation I would be doing any math, lulz), but, personally, I don't care about the multi: I'm not here to, grind, but to have fun (whatever that is). But, for a lot of people, the main fun seems to be the grind, keeping the multi, stacking the teams (or rather, BE in the stacked team). In truth, I wonder how people would react if we finally got a working balance, where x5 almost never would happen.
I'd like that too. I hate pub stomps, coming from the old days of pubbing Half-Life mods online. I play the game for fun (done retiring after this retirement, I'll only be gen 8, +3 heavy lance, +3 courser, and selling the loompoint this time so I never have to worry about money or retiring). But the fact is this game revolves around retiring and pixel crack, and in order to retire you need experience, to get experience you need a multiplier.
So if you ever want people to get on board with "balanced" teams (aka having class/skills, and K:D be more of an influence than banner) than you will need to change how experience is earned.
It would be better if more games were based on individual skill and (and how you allocate skills/attributes in game) rather than what piece of pixel crack your character is wearing or holding, but it seems like every game for the past 10 years has been focused on obtaining items, not on playing the game for enjoyment and individual player skill.