Expanding on this, I hope to see a lot, and I mean A LOT, more usage of combination moves.
Fifth generation introduced this with the Pledge moves (Grass Pledge, Fire Pledge, and Water Pledge) where using two of the Pledge moves some new effect happened on the field.
I would love to see this work especially for Contests because it seems so disappointing that we never got to actually use combination moves as frequently as one could hope for during fifth gen.
I imagine a player combining the powers of Vanilluxe and Magnezone, using Autotomize and Magnet Bomb respectively to make a sparkling red-hot Magnet Bomb design to amaze the judges and audience.
That is somthing that'd I'd really like to see for Contest revisions in these games.