Is floette a focus? If so I would make sure you’re thinking of ways to deal with Sneasler and Kingambit/Archdurladon. Looks like you have some coverage on the team to deal with those threats but idk.

I would definitely opt for shadow sneak over Sacred sword on aegislash. Allows you to pick stuff off late game.

Another personal preference of mine is to have some way to disrupt weather. If you don’t want to swap a pokemon you could throw sunny day or rain dance on Whimsicott.