This was probably meant as joke initially, but imho it would fit into the whole TTK thing phoenix likes to do somewhat.
Of course good groups won't have really issues, but it would have some effect even on those. Caster setups would have a far higher skill ceiling, melee not that much, but i think that is okay with the current meta. So all in all this sounds somewhat interesting and could solve as sideeffect the archer zerg stuff or at least make it less effective. Even as just a trial for some weeks i would really to see this.
As bonus could this make some hillarious moments in comms when people screw up