Astonish, Gyro Ball and Ice Ball clearly show physical movement from the attacker's perspective, therefore there's no question that the moves themselves are physical (Sacred Fire is ambiguous for obvious reasons). That's not what I said at all. If you look at Double-Edge closely...Pikachu never moves from its position to the extent that you and Yveltal are arguing that Sylveon does, all it does, is tackle the opponent.
How can you even say that...? Look at the four pictures closely please...there's no indication that Sylveon travels with the energy nor strikes Hariyama.
You've got a point there, there's no orb of energy in those Double-Edge animations. The indication that Sylveon travels with the energy isn't when the attack hits, but rather when the orb leaves Sylveon position.
In the end, I believe that it's much more probable that they changed Double-Edge charging and moving animation for the sake of move variation with these new graphics. It's so much alike with the 5th Gen animation and it's a move that Eevee already has.