BTW, to the question of where the threes are coming from on my team: it's definitely a little on the low side for one of my teams, but we ended up with 489 total. I'm using Magic and CP3 seasons that each chip in 100+ threes, and McCollum really helps with 193 threes in just 1823 minutes.
BTW, I'm still not thrilled with my McCollum pick - blah D and not much rebounding - but that 20-21 season really is very useful. 27.1% usg, 55.4% efg, boatloads of threes, solid assists, low fouls, and that absurdly low turnover %.