The ability of having multiple champs will have multiple abilities. Understand that it's not meant to be swapping 24/7. His kit revolves switching in accordance to their best suited needs (Hytren for more close quarters areas and Mooren for bigger, open maps). I balanced the ult so which each ability is used once, and even then you can counter those with resilience or just avoiding him in general, since he's a melee ult.
But know I do understand your point where you had with the comment, and this is just my general explanation of what I had. I might extend the time it takes of swapping people by a few extra seconds, not sure yet.