You still have Glaceon EX, Articuno, Regice as other attackers it can be used for. Also M Gyarado is something to look at with Mega Turbo. I haven't really sat down and looked in-depth but there are others besides Lapras GX. Plus with Alolan Nintales, Wishiwashi GX coming too. Just to name a few.
There honestly isn't a lot of targets for Aqua Patch.
Glaceon and Regice use DCE.
Articuno, I'm assuming the ancient trait one, isn't really used much; and one of it's strengths was being able to stall for 1 energy.
I talked about Alolan Ninetales and Wishwashi in my set analysis.
I think it could be good on Wishiwashi, and he might actually see play in some Rogue water decks (with maybe Kyogre or Gyarados).
But Ninetales is... a bit clunky, because ideally, you'd want to use DCE for it's first attack... but it's energy costs force you to attach water energy to actually do damage.
It just seems like you're burning a lot of resources on a card that doesn't really excel at a specific role.
Aqua patch is a good card that, in my opinion, doesn't really have a deck to go in.