Yeah it's too easy.
And the fight is boring.
Nothing elitist about it OP.

The Stormblood primals have nothing compared to the previous expacs if I am honest.
The thing that got me about Byakko is if you can do it on normal/story mode - you pretty much know what is going to happen in Ex. There aren't many differences at all - and the difficulty is actually not that much higher.

But like I said, the fight is so boring. It's arguably harder than Susano, but not much (if at all), and infinitely more boring than Susano.