It is pretty unfair because they didn't have to go through the struggle of learning the mechanics, making mistakes, and perhaps get booted for not delivering enough DPS to defeat the EX primal. Now, it only takes them maybe 4 mins and boom they're done; and to put a cherry on top, the drop rate for the pony/bird is crazy high so they get those easily.
It hurts :[
EDIT: However, on the other hand, having unsynced is good because it makes farming quick paced and ppl get their whistles or mats at a faster rate; well depends on how fast the item drops lol.