Reach gaps, super long jumps, conflicting arrows, and inconsistent marking of guidelines is for sure unsafe.
I haven't seen too many reach gaps still around, they've been removed for the most part (if you mean a reach gap where you pull the line over to the mainline and connect not just a close gap). I'm not sure how a really long jump is that big of a deal since just like here it's often to keep some people out of certain areas. I have yet to see a "conflicting arrow". I see arrows pointing to the closest exit, which isn't always the best exit, but that may conflict with your exit.