it's all about the TMs, abilities, natures, items and pkms we can get.
without some certain items, TMs, abilities, natures and pkms
some strategies and pkms will become very overpower
so i do hope they can add more TMs and items and fix the bug of some natures and abilities.
The best thing of pro is that they don't allow ppl to get legendary pkms like Groudon, Kyogre, zapdos etc
or everyone will have a Groudon and Kyogre in their team
that will be extremely boring in pvp