That "Israeli site" you reffer to is actually the Forum i manage and admin - and the photos were posted by me. At least have the courtesy of giving proper credit!
Not experimental, this is a standard operational improvement. After the Namer gone active at big quantities, all the older HAPCs were retasked and improved for their new roles. Take a look at recent Nagmachon photos, they have some new parts installed.
Wildcat is an IMI product, why would MASHA display a competitor's product in their 70th anniversary ceremony?! it doesnt make any sense.
Also, Sandcat has to many vulnerabilities compared to the spartan design on the humvee - so its not an equivelant to it.
Forget the Eitan and open your eyes - 2:26 and 2:31, next to the humvee, an armored light truck. its NOT Wildcat, not likely armored LMTV, honestly i have no idea what it is...