not only that, the pokemon need(ed) to be the active, and most lvl X powers reside in their poke powers/bodies, not attacking skills, meaning you waste 1 turn putting it front and leveling, then a lot of energies pulling it back (see Giratina Lv X, Heatran Lv X or Hippowdon Lv X) of course, some can defend themselves pretty well, like the garchomp Lv X or Dusknoir Lv X, which basically screams kill me.
i say needed because now we have level max, which is awesome, even with the need of a coin flip