Ending the match faster has no impact on this. The system will be tweaked further so that any current false positives are resolved and people who continue to exploit loopholes to get challenges done for essentially AFK farming will be subject to more severe punishment. This step was just meant to ensure that the majority stops, because it was A LOT of people that contributed to challenges being farmed and not feasible for bans. As far as sitting goes, I think if 20% of the match is spent sitting it should not be a problem, but an absurd amount like 50% of the match spent sitting should not count toward challenge progression anyway.