Tbh im not agains it
It should not be locked behind big endgame barriers. IMO, leveling should never be locked behind endgame content. For that, we have instances or new big content (like HoL). Making it doable with a troup of 6 with Grace/Illusion/Automatic Set players should be cool.
If you really want party play in the focus, add mobs like in alice. 1 Physical and 1 Magical Mob so you need at least 2 Dmg chars to do it.
But thats my take, overall +1 for me