"The biggest problem with potholes is the way they repair them, bunging a bit of tarmac in and levelling it off doesn’t seal the gap."
Having seen them in action (and the results of their repairs holding up for a few years), I believe jetpatchers (when operated correctly) solve that issue nicely (and fill most potholes in less than 5 minutes whilst doing a better/more durable job than a roading gang does in 2-3 hours)
In a lot of cases potholes keep opening up because the roadbed itself is fucked. When Cock lane in Surrey (yes really, it's near Bookham) got redone a couple of years back it was found that the roadbed was utterly waterlogged and what was supposed to be a simple £5k resurfacing job turned into a £250k+++ job as the road had to be completely rebuilt from the foundations up.
http://www.getsurrey.co.uk/news/surrey-news/cock-lane-crusader-giant-penis-11729269
During the rebuild a significant number of roadside drains were uncovered. It seems that contractors have a bad habit of sealing over the gratings when resurfacing the road and they never get uncovered again, which is how the roadbed ended up so waterlogged. The road now has 5 times as many drains as it used to, but no new ones have actually been installed.
Perhaps the survey vehicles need to run metal detectors and flag when they find a mass at the edge of the road but no grating on the surface - there's also the point that not enough attention is being paid to drains - it's a lot cheaper to keep these flowing than pay out to fix potholes.