So I keep waiting to see if you guys are ever gonna fix this issue with players getting dragged under the floor during Kzarka and forcing those players out of the fight. Like its happened to me 5 times and I'm pretty annoyed with it at this point. I know its affecting other players as well. You guys are rushing to catch us up and are breaking things in the process. Either slow it the hell down and do it right or fix the Important issues like Quality of Life. I want a working game. Not a glitchy half ass game.

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Have you tried the "Hide Adventures" option in the performance settings? I have not experienced the falling through the ground bug but perhaps doing so will smooth out the intensity of lag that you may have been experiencing during the combat of the boss of worlds. Though to be 100% honest it works a sort of a double edged sword as for one , you will not be able to see your party members if you take any along with you , and also if there are any red players in the crowd they will still be solid and may end up being an invisible wall so be mindful of that. (though you could just press L2 and dodge "through" them , so that is cool) 
Hope this helped you!