It’s in the “spirit of vanilla” to change all mob pack behavior? What other changes will you attempt to rationalize away as “in the spirit of vanilla”?
Last night I tried to do the Winterfall Runners quest. Although the recommended method as late as September was to kite one until the others leash back, that is no longer possible. A 57 can’t possibly deal with 3 level 57 mobs who will follow him to the end of the zone.