MaddenUniversity Yeah man, I'm getting up there too and I totally agree with you. I don't play competitively anymore, so the incentive to learn new mechanics this is definitely low priority for me. I still often use O/B to switch as well because that's what we've been doing in Madden for the last couple decades and that's a muscle memory habit pretty hard to kick. It's not that I'm not willing to use Switch Stick, but it's not where my mind first goes in that situation tbh.
I remember QB vision and I literally don't know anyone that liked that. With QB vision, that right hand (specifically the thumb) was asked to do too much with that specific mechanic. Having to adjust vision and then transition the thumb over to a button to make a throw wound up being too conflicting and negatively impacted the timing of throws. Decent idea, just not one that could be well incorporated.
In terms of how you would hold the controller, first off, anyone capable of using both index and middle fingers to execute inputs is god tier talented imo, lol....I literally cannot do that. But with this specific mechanic, and how it relates to holding the controller ultimately, I don't think how you hold the controller would be severely impacted. Essentially you'd wanna hold it just like you were playing COD almost, with that left index consistently hovering that left trigger while your right hand does most of the dirty work, constantly trasitioning between the RS and buttons while that right index opperates the right trigger for speed control. With this mechanic and how the controller layout already is though, I don't see how we hold the controllers being severely imapacted. I just don't think it'd really change how we're already holding it. But without trying it, we may never know either. EA would have to tinker with it and have it playtested.