Players connot join the party while you are engaged in combat

[Peregrine]

Kiting is for weak teams who think they're smrt.
Leave them without their hate resets and thief swaps. See if they can win legitimately.

Leave every feature as-is, or watch the player base beg and scrap for the cheapest possible tactics.

When the going gets tough, the mmo player...chickenwusses and skirts it.