"no one is playing this game much anymore"
Whoa dawg you put the planeswalker in front of the creature. We have a great community of AotP players with online presence. On this website I post every month or so. There's also the "Planeswalker Arena Boards" site which gets AotP discussion/activity, too.
I actively create YouTube content (channel name same as here: Unhinged Manchild) almost every week, anything from talking about design philosophy to livestreaming games/chats with players in the AotP community and even with people in the Heroscape community. Feel free to message me or check out the links in my signature, it's all in-depth AotP discussion, and links to my videos are found in those threads.
I highly suggest you join the AotP community discords where you can chat with us and play online on both Tabletop Simulator and Roll20, we do customs playtests pretty often:
https://discord.gg/nFuU9MQXKq
I've helped many players clean up the wording in their customs to align with official AotP lingo/rules, I can help you too! I'm interested to see what you have come up with!