Here are my thoughts about prankster confusion abuse in the current meta (and pretty much all metas). My problem with it isn't that there is luck involved, because luck is a part of pokemon, critical hits happen, freeze happens, high damage rolls, long sleep turns, etc. My personal problem with prankster parafusion sets are that they rely on luck. As seen in the replay, it hardly matters what team you are using when you are playing a team like the one Tennisace played. Tennisace managed to win, but he just as easily could have lost. The same team also has (slightly over) a 50/50 shot against a team with zero wins, ignoring many (not all, as magic coat/taunt users can be added to teams) aspects of team building, as well as player skill level. The case isn't the same with using thunderwave, as I'm not using it to get those full-paras, it is to speed control the other team. A full-para is really more of a bonus, that stops pokemon from being extremely predictable. I guess my question is how we go about this, as Murkrow, Purrloin, Illumise, and Volbeat also have prankster and access to the same moves (bar foul play for the latter two). Are we considering banning all of these, because banning prankster parafusion is a complex ban?
TL;DR: Prankster parafusion is unhealthy for the meta game, not because it introduces luck, but because it completely relies on it, disregarding the competitive aspect of pokemon.
Edit: @below, that makes sense, although I don't know if I feel none prankster confusion moves are broken or unhealthy, they very well might be. I think interesting discussion will come from this though.