The idea was more like, the front positionals are for the main tank, not the off tank, like the positional effect is increased enmity generation. But I think the bigger flaw isn’t actually with the positionals themselves but bosses that don’t have positionals and thus always trigger them. Like if you’re facing a wall boss, the off tank would be triggering the extra enmity as well.

Maybe it would make more sense to have certain actions that have different effects based on if you’re at the top of a target’s threat table or not. Like if you’re at the top of the threat table, the action inflicts a damage down debuff and further increases enmity. If you’re second on the threat table, the attack deals increased damage.