protected area rules need to be looked at too. too many inconsequential minor incidents given 50m. I also can't see why the protected zone doesn't apply to the attacking team. doesn't make sense for them to roam free as a bird anywhere in the zone. when it's a set shot close to goal the umps don't allow attacking side players in the zone but elsewhere on field they do.
on the stand rule, i'd say 50% of defenders are not on the real mark position. umps rarely actually set the mark except when it's a set goal shot. and finally the umps lately see to have gone really hot on play-on calls, even when the players feet have not moved off the mark
all in all, setting the mark, determining play-on and the protected area cause a lot of confusion