I don't know those pads, but I DO know ZX2s.
Most anybody's premium pads will feel like larger brakes were installed.
See what the friction ratings on the side of the pad are.
Hopefully, FF or better. [EE is worse, GG better]
And what about the rear drum brakes? Make sure they are free and lubed up.
If things are perfect [including the P brake system] , try tightening the brake lever so it engages quicker. This will make the shoes engage quicker, and believe me, the felt improvement is great! Just make sure the shoes release completely when you are done.
And why do this? The stock wedge adjusters leave too much movement before the shoes engage. This is common with almost all drum brake self adjusters.