Well, I might be the only BPLer who is glad they held off on getting the original squeeze! ;)
Lighter, more compact, more versatile, female threads and nipples on inlet and outlet. Seems like a perfect revision to the squeeze. I wonder if they're even going to continue making the original squeeze as this one seems better in every way.
Re backflushing: Since it has internal threads on the outlet, can't you use any bottle it'll screw onto to backflush it now? Or with a bladder system by connecting the drink tube to the outlet nipple (of course, do NOT use your dirty water bag to backflush!)? If so, yet another significant advantage over the original squeeze.
Definitely time for me to upgrade my water filter!