These are good questions. I have a high-IV totally maxed out Vaporeon WG/WP that I will always probably use to pop in gyms, but I'm really disappointed at the WP nerf. On top of that, where I live, even a maxed Vape is getting hard to get in above the bottom.
I like your WG Vape as an attacker, but given how low he is, I might hold out for a WG/AT Vape which to me, now, is the best in both categories.