Could polymer coating on main and thrust bearings and inferior crankshaft contribute to Corvette C7 Stingray LT1 engine failures?

Polymer coatings have been used in engine building for a very long time, typically they are used to decrease friction and subsequently, engine temperatures.  Formerly, these coatings were used for piston skirts and main bearings in racing applications, however, lately, this technology migrated into cars like Corvette to both increase fuel efficiency and increase power (less friction is more power and less heat).

During the previous generation of Corvette, polymer coatings found their way to LS7 and LS9, with the LS9 application limited to piston skirts only.

However, in LS7 engine, the polymer coating was used on the main engine bearings.  Interestingly enough, although buried among all the dropped valves, there were numerous main bearing failures as well (they still continue as a matter of fact).

Since the use of polymer coatings has been intensified in LT1 engine, it is not all that surprising that main bearings fail on LT1 engines as well although there is also an addition of redesigned thrust bearing failure as well (thrust bearings were full and non coated on LS7 engines).

Is this just a coincidence that both engines using polymer coating on main bearings, even though separated by a generation still show very similar mode of failure?  This is purely rhetorical question of course since there is definitely a correlation between the failures in both of these engines.

Furthermore, in addition to these inherited and apparent flaws, there is a strong indication that the new crankshaft and rod bolts may be suffering from quality issues as well.  If this does sound somewhat scary, this is because it should. 

+General Motors never acknowledged design or quality flaws with LS7 engines and did not even bother to rectify the much simpler and cheaper to fix issue of defective valve guides that cause exhaut valves to drop like dead flies.  Certainly it is no big surprise that the more serious issue of polymer coated bearings failures was never even mentioned.  Those who had the dubious honor of experiencing main bearing failure on LS7 engines fully understand this part, others of course will take the path of denial.

The unfortunate fact remains that polymer coating related problems reappear once again, this time on LT1 engine and soon to be transferred to LT4 engines as well.

The question here is, how long will this continue before +Tadge Juechter finally acknowledges the need to investigate this problem further?  NO polymer coating on LS3 and LS9 engines and no failure of bearings-perhaps something to think about?