I don’t think Saladin/Saracen had any kind of protection equivalent to today’s?
if you ever look inside these, they are cramped - no space for ECM or even modern radio suite.
I think they were of their time and had reached their end point. Replacement by tracked was the Army shifting from 50s global low-medium intensity to BAOR high intensity and even then only able to fund one.
That modern 8x8s have massively grown the ability of wheeled doesn’t mean it would have been right to be in the earlier generations trying and failing to do BAOR.
Saladin etc, were designed to run with ‘any 2 wheels’ destroyed, by mines. So some thought was put in, and as their predecessor was presumably the Bren carrier, they were probably a big improvement, in their time. Not sure fv432 was any particular improvement in this regard.
Saracen etc hung around for a good while, Northern Ireland etc, and I think we had a few Saladin in the late 80’s for airfield Defense, then replaced by scimitars. Also reputedly the Kuwaiti Saladin tookout a couple of t55 at the start-of GW1.