On offensive Yveltal, sucker punch is important for priority.
Generally you don't run max attack on Incin in favor of more bulk, but if you like it to be stronger it's fine.
Generally, Sitrus Berry is preferred over pinch berries since it turns a 2HKO into a 3HKO, unlike the pinch berries, but it's mostly just preference. Calm mind over ice beam and more bulk is generally preferred, but if you'd rather use 3 attacks and 252/252/4, I'd suggest life orb since you're not using it yet and Dynamax Life Orb Fini will catch a lot of people by surprise.
Electroweb instead of thunderbolt is a must on Eleki, speed control is very important in VGC. Light Clay is nice on a screens set, as well as a lot more bulk to capitalize off of the screens.
On AV Kartana, you need a LOT of special bulk, but otherwise it's fine.
Finally, all of your offensive Pokemon are max speed, so Dusclops feels like a wasted slot, unless you added a trick room sweeper. Something like Landorus-T can help against Zacian, which is otherwise pretty annoying for this team, as well as sun, but that's not as much of a problem. Amoonguss can help keep your sweepers around longer and also help against Trick Room as well.
Alternatively, you could keep Dusclops and swap Incineroar for Glastrier, to make this team almost exactly the same as Wolfe Glick's Player's Cup II team that he used for the first part of the competition, except that now you have Yveltal instead of Moltres. I'll link the team report here if you want to check it out.
This is basically what I would suggest, I would probably recommend using calm mind Fini and making both Incin and Fini a little more bulky as well but since that's more of a preference thing I left it how you had it on the PokePaste. If you'd like to use a more Trick Room-oriented team, check out Wolfe Glick's video.
I hope this helps!
