How long do you guys recon the poron insole last on these boots?
I don't see why it would fail before the sole does, and you could just get a new insole when you take the boot in for a resole if you were worried.
BTW with regards to your blocking crease line... I am unfamiliar with the finish of leather you have but I would be worried that the colour of the crease may not completely go away, even though the shape will. I would discuss with RMW staff about that to be safe, make sure it is not a defect.