I'm really liking this Top Entry ability and the fact that it's distributed to a handful of evolving Stage 1s. I wish this Carkoal here had Top Entry too, lol.
Milotic-V actually looks really good (artwork especially); don't just forget the rest of our Retreat-up cards like Galar Mine and Absol. As for the cost, it's not like Frosmoth and Bucket don't exist. Does it really make sense to complain about a Welder-esque 2 from hand + the manual attachment for an immediate attack? It's definitely better than the Drednaw from the Inteleon deck (same cost), at least.
Anyway, I don't play pure W decks for personal reasons, so to me, this is just a pretty card that looks somewhat desirable from a collector's standpoint, and somewhat teachable in an Absol deck from a player's standpoint.