That MorRyde is an interesting system, appearing to address the worst of the rear suspension complaints, but time will tell concerning the longevity of the rubber interface between the leaf springs and the chassis. One thing it has going for it is it's simplicity.
Liquid Spring is a very expensive, evasive, and complex system that I shy away from for those reasons. If the system fails during a trip, I would not be confident in finding a reputable company in a remote area that could address the system failure.
In the world of RVing, the term KISS comes up often.
K - Keep
I - It
S - Simple
S - Stupid
Everyone has their own idea of where the threshold is. My threshold is lower than many others on forums. If we lived in our motorhome seasonally, I could see increasing the threshold of KISS. The MorRyde system easily falls within my personal threshold.