Party play and Mercenaries

Subject in the title.

So, what's the point of making all party members, except instance owner, allied to the Mercenary? It literally disables all buffs from party members to instance owner (carry).

For example, if a carry relies on an aurabot's buffs, the carry literally can't kill the Mercenary because all the auras from the aurabot don’t affect the carry during the fight with the Mercenary.
None of us (nor carry or aurabot) can't hire Mercenary because of this. It is impossible to kill them 1v1 in such situation.

This just makes Mercenaries pointless to interact for such parties :(

I see there's a Hotfix 4, with a solution.
This thread can be closed then :)

Yeah really stupid. idk