Since I'm genuinely unsure of whether I'm missing something, I figured I might get some helpful insights from more experienced people here.
Is PoR actually enough after all that has happened so far?

This is not enough of course but knowing the PoR from CEX can at least give you peace of mind but again, it is still not advisable to hold too much money on any exchanges because the worst can still happen and that PoR might not be enough to cover all the losses.