chell
This is honestly more of a problem with TF2 (or maybe comp games in general? idk I haven't been in any other community) where teams don't stick together, so more often than not, if people win a div, they likely won't stick together. Some will play low adv, others will go back to main on offclasses. Also, I feel like the only teams that benefit from sandbagging are high main teams, and while it's important to bridge the gap between main and advanced, by having sandbagging you also increase the gap between high main and mid-low main, as the low teams gain 0 benefit virtually from being rolled. Overall, I don't really think having sandbagging benefits high main teams enough to justify the negative effects on fairness and enjoyability of the lower divison teams.