Good post, Pig. But to be fair a lot of us are playing Ultra over Injustice for a whole gamut of reasons. Sure, I'm definitely playing SF to help improve my footsies for MKX (which will be my main game when it drops, no excuses, no bullshit. I'm coming for fucking scalps.) but some, including me, have simply fallen out of love with Injustice. There's a lot of gimmicky shit to this game and in many ways I feel like I've reached a personal plateau in IGAU so I'm stepping over to Capcom and Anime, not just to become better in those games, but to become a more well rounded FG player coming into MKX. Also, straight up, I'm having more fun playing Sakura that I ever did playing Supes or WoWo.
I'm about to pick up LOBO to see if I can't get back into this game, but I personally feel like I'm not learning to much from it anymore. That's when it comes down to a personal level. Not everyone can pick things up from the same games in the same ways. Some need different approaches and perspectives on how FG's operate to improve. IGAU wasn't helping me improve my execution or my spacing, so I started playing Ultra and BlazBlue. And you know what? I'm nailing these 1f links. I'm remembering bigger and more complicated combos. My pokes are crispy and my whiff punishes are fucking mean.
You're absolutely right. But a lot of us, myself included, feel that we're not improving as FG players by playing Injustice, so we're exploring other games. I don't hate on anyone for doing what they need to do to improve, whether it's IGAU, Ultra, or fucking Divekick. To each, his own.