You are just writing about the differences between PvE and PvP. But guess what? If you want to play competitive it's in no way different. you need the best build, gear and playstyle and you have to know your character like noone else to be succesfull.
Some things behave different in PvE and PvP but to be competitive you have to follow the same rules.
But in the end, such a toggle will never happen. I guess it's more likely, that ZOS applies the possibility to change traits on your armor/weapons through crafting.
But the worst ZOS can make, is a system which allows one part of the playerbase to get their BiS trait immediately whereas another part has to grind for ages.