In one respect it's easier if it did not work, add more bypass etc, but this is power good issue. All LDO's with a power good output that I have ever worked with have a protection diode to vin so the pull-up is connected there,
The device chosen seems to have the protection diode to vout so the PG signal cannot be higher than the output. In this case, the regulator produces 1.2V but a PG of 1.2V is not enough to enable the next stage, in fact it's worse than that, I have it connected as usual to Vin and then the diode conducts so the PG is only 1V instead of 3.3V. The spec does not say this, just that it's the usual open drain output. I have inferred all this by observation. it's useless.
Attempting to bypass the PG is a mare as apart for 0.5mm of track it's all on inside layers. We do not have a trained wireman, so I am attempting to do it myself, and it's way above my confident skill set. After I have proved the solution I can send the board back to the manufacturer that do have such wireman.
I have to do everything. Design, layout and repair/rework. I have one software test engineer that is a bit handy with a soldering iron but he said he would not touch the board with a bargepole lol. And management is panicking and losing confidence in me, not alowing me to change the device for the next iteration without proof of working. If I had to do this for every part of the design it would taken years to build the design bit by bit, and cost astronomical. The boards cost about £10k to build as prototypes.
Going back to the initial question, confidence is everything and for all the successes I have, one error and it all goes tumbling down.
Also the company wants everything, pimping me out to other companies to get revenue to offset my salary instead of just having me as a R&D resource. And these issues are the consequences of only allowing me to work for 2 days a week on this very complex PCB and off to Teledyne to work on their projects for 3 days. I always have to generate revenue instead of being a capital expense, generating income when they sell the PCB's.