I disagree - (just not about the need for low flying)
It seems to me the Mach Loop is used out of all proportion to the rest of the low fly system. It might just be a coincidence that there are lots of spotters with cameras and then crews asking said spotters if they got anything from their pass(es)?
Some formations going round the loop multiple times - presumably to get their photo taken?
What happened to spreading the load?
Maybe the supervision on flight planning is not quite what it could be.
It might have changed but wasn't overflying the same point more than twice discouraged.