Spent an hour today trying to hold a pick "normally" with just two fingers with the index curved in slightly and found I can pick single notes a lot more quicker and effortlessly but at the cost of strumming chords and power chords like a complete newbie, would you bother trying to unlearn 15 years of using a grip like pic related and basically start over? Or would you try and learn how to switch quickly between the two for different playing styles?