Points differential has its limitation as a valid parameter.
Just today in my league, two teams were playing for first place in the other conference. Their points differential is not exactly similar, but close enough. The problem was that current leader played against a bot (winning 25-0) and the other played against a very weak team.
It was very prausiible that the other team will win with over 25 points difference and take the lead, and the leader could do nothing about it.
Just a simple example.
maybe not in that moment, but when he play against the weak opponent the opponent for place one plays he could win higher to be more points ahead. And the second placed team who advancced during this situation, has a 25-0 win against those team too only a bit earlier.
So what happens when the one team has the 25-0 Wo in the week they against each other, and the other team has a second important match that week so he had to play some backups, that would be unfair or not ;) When we construct examples i would say, this one is better.
Just don't try to convince me that the best parameters are used, especially since in a case of a tie in points differences - you prefer the team with more points.
I would say the ebst ones are used, because you could handle point differential consistence, even in the PO finals where a direkt matchup was silly because of the home court advantage ... And both systems, refelct the teams strength, the one more in 2 single games, the other one refelct the game during the whole season.
If one team plays against a bot more times during the season and score 25 points per game, according to this parameter, this team is weaker. Is it really?
25-0 iain't a bad win, i have pretty less games with such a high differental.
But this is the problem, that the league is changing due to activity this made in unfair anyway.