There's a big difference between Berry and Capsule, though: Berry discards itself after the Pokemon attacks, making it a one-time deal. Capsule sticks around so you can get more use out of it.
That and it's easier for the inevitable "Aether Paradise Employee" card to just say "Cards with Galarian in their name" instead of "Cards with Galarian in their name and Evolutions of cards with Galarian in their name".
Well, the baby Tag Team and Misty/Lorelei are already confirmed to be in Cosmic Eclipse, and the Trev/Dusk Tag as a promo, so it's anyone's guess really.