Hi, I might be the one who made the other thread you are referring to dreambled. My two cents is that if you don't want to activate sneak attack, then attack in a way that wouldn't activate sneak attack. Get off high ground, don't be in stealth, equip a non-ranged or finesse weapon. There is no need for a toggle when the basic implementation of sneak attack, automatic or not, is itself a toggle. The default design of sneak attack should reflect how it's used the vast majority of the time.
