This is more for H6, but I would like 343 to give some score for boss kills if you specifically took a certain percentage of health off a boss, but didn't get the kill. We've all been there where we take 95% of the boss's health off, but then end up dying and not getting credit for the kill because the teammates didn't kill the boss fast enough. I think that would be a good addition for H6.
Just a couple observations:
This goes to my previous post on this page, but I think the speed boost score is capped at 1350. I think that's one reason why we don't get those 10K XP scores anymore in Heroic and likely more in the other ones.
One thing that I've been noticing since the game came out is that it's been taking longer to level up your win percentage. When the game first came out, it took 3 games to level up a tenth of a percent (10 -10.1). Several months later it took 4 games and now for a good while it's been raised to 5 games. I'm still not completely sure, but I think they raised it again to 6 games. I've only been trying to test this for a couple days now so I still need to complete more games. I know it's not the end of the world, but I wish they would stop quietly raising this without saying anything.