With the coming update. Soulbeast will lose its ability to pet swap. This allows for a single merge to trigger clarion bond and zephyr's speed. With unstoppable union's change to give vigor and protection a single merge will grant the soulbeast the following:
Fury, 3 stacks of might, swiftness, quickness, vigor, protection, unblockable, and superspeed.
This is currently still possible in the current game. However, to do so requires you to press 2 buttons very quickly and have 2 CDs ready at the same time. You must pet swap merge VERY fast. This creates a skill differential that allows for a skill ceiling and gives an edge to more experienced players.
With the new update we will be moving away from this. No longer will players have to wait for their pet swap AND merge to be ready, and have to pet swap merge practically simultaneously to break a block (requiring patience and forethought) now players will be able to simply see a block press a button and slaughter someone... it drastically lowers the skill ceiling... something ranger does not need, nor the game needs.