SorryFace Yes it was broken, the SPL-scaling was 5 times higher than it was supposed to be.
They did not do it to annoy AM players, they did it so that it behaves exactly as on kRO.
For the same reason you wouldn't want gm's to custom buff their favourite class, it would just as bad if they'd ignore a bug that makes AM deal way more dmg than intended. I agree that it's sad for AM players, but it needed to happen in order to be fair to all other classes who don't get to benefit from a bugged skill.