We really need to know if this PCB is of better quality than the old boards. The fact that the epoxy is there on the corners of the chips seems to suggest its not.
This is a damning testimony to the poor design of these boards. The Epoxy is little more than a bandage that does not cure the disease. Its inclusion says every word that MS themselves refuse to say because if there wasn't a problem, it wouldn't be there. This was their chance to do a real fix and use better quality PCB, but they've opted for the cheaper dab of glue 'fix'.
I'm thankful to those that are prepared to expose these types of shortcomings and inform the general populous who have no idea of what is happening under the hood.