Do you even know how the sth 12 and 16 are made??? do you even know theyr heel piece are pretty much indestructible????
this is not a s912 or a z serie it's an sth.
you are bad mouthing one of the best binding ever (my personal opinion and teh one of many professionnal athletes and users)made by comparing it to a totaly different binding.
answers to your arguments:
1- the toe piece on the sth 16 arerealy well made and have really good adjustement with the 2 screws on the side making it stronger then the 1 screw stripping piece of shit that the 912 had. And that toe piece designare prone to breaking if your seth morrison jumping off 15o drop doing doubles...
I tought mine were fucked and finally was ableto adjust them back with minor adjustments and repair.
2- The heel piece on the sth serie is the same as on the 916, 920 wich were and are still ne burly ass heel peice tracks, I broke a whole bunch of 912 but havet seen any broken heelpiece on this heel piece track design. They do not have a fliping
 argument for p10:
1

ivot 10-12-14 werent metal, they were plastic and did break a lot more then the sth 16, s914 lab and s916 toe piece. Most look rossi sponsored athletes were using all metal -15-p18 bindings cause tehywere full metal but no upward release so not that good for most of teh general public. I personally seen a lot of riders break them  in pieces so I woudnt say they are that durable.
2: if you really want your skis to flex naturaly get some of these bidningswerethe toe piece and heel piece slides on a plat so the ski flex  under the binding too.  but wait these are uber heavy bindings for recreationnal skierso I guess tehy arent that good of and idea. the tight screw pattern is also way more prone to ripping out and with the softer cores of nowadays park skis you'll prollybe needing helicoils soon if you ride pretty hard  or lan on your face a bunch