My experience has been completely the opposite with significantly more than 4 games played.
If anything, the absence of ridiculous XP has made the leeches largely disappear and the only real concern are Korrak killers.
My win rate as a largely solo player has gone from 42% last year to 63% this year. Many good games, including 3 where Ivus and Lok were summoned at the same time.
https://us.forums.blizzard.com/en/wow/t/epic-korraks-revenge-games-this-week/720071