>>46206442Adding to this, the introduction of the balanced boost of 'discount Magic Guard' means that a lot of defensive mons that would usually get heavily chipped by spikes are now completely immune to the move, which make a suicide spiker lead's job less desiderable.
That, and how Smogon handled the DLC mons with monthly quickdrops / rises with lower usage cutoffs, which explain the humongous amount of low tier / untiered mons this gen and the numerous obviously broken mons in said lower tiers (some of which still need to be banned)