Yeah, but that seems to be an issue with aftermarket membranes mostly. I haven’t found any that aren’t stiffer than the OEM by a significant degree. If you can find an OEM membrane in good condition, and combine it with the cardstock mod, it usually reaches about the same stiffness. However, after all this time I’ve found OEM membranes tear pretty easily, making them even stiffer than aftermarket, so I personally opted to deal with the stiffness of aftermarket membranes combined with the cardstock. Though nowadays I actually just use an SP because I like that dpad more (it uses metal membranes that don’t as easily wear down.)

I had this problem with one I modded myself because the new screen was just slightly thicker than the old, pressing on the outer shell and causing the dpad to need more pressure. The solution that worked for me is cutting a small ring of cardstock and putting it between the dpad and the membrane. It increases sensitivity by a lot, but does come with the side effect that you’ll be able to press every direction down at once if you press on the center.

The Mad Catz Dreampad for the Dreamcast is the only 3rd party controller I’ve ever encountered that’s better than the original. Better grips, extra face buttons for fighters, a nicer analog stick. The whole thing just felt really high quality. The exact opposite of what you’d usually expect from Mad Catz.
Only issue is for whatever reason the white ones have a crooked d-pad. All the other colors are fine.