Class C Express 4500 Chassis

Hello,
I installed a set of SSF-204-54 on our class C motor home. They made a huge difference in sway and “porpoising”. They’ve been on for about 12k miles. Prior to installing them, I replaced all of the shocks with Bilsteins. That was at 21k miles… we are now at 33k miles.
I’ve noticed my front tires are beginning to “scalp” in the centers. We had the alignment checked today and all is good. However, the tire shop suggested the front suspension is too stiff and causing the front tire wear issue. I’ve ordered new tires but before we install them, is is possible the SSF-204-54’s should be replaced? I am reluctant to put the stock bump stops back in so would rather either leave these in place or go with a softer set.

Regards,
Gary