Second, and probably most important: our team already has 2 powerful special attackers. We still have to pick at least 1 defensive mon, a physical attacker, someone to lay down SR, someone to spin, and possibly Politoed if we go for a rain team. Having 3 mons on the special side severely limits our team building options.
While I can see that we are going to need a physical attacker for sure, do we need the rest? Did we decide the theme of the team was to have a balanced set up and not an all out nukefest? Meloetta works under any weather, same with Thundurus-T so rain is not necessarily a given yet welcome should the team come up against it.