The zoning difficulty I am pretty certain is related to the zone_points table, so that's a db issue and not one with the detection system.
However, PEQ did see several false positives of the warp system in times with no lag and low server load. It did get so bad, we had to remove the system. Players on PEQ are able to break anything
On the plus side, it DID catch several legitimate cheaters so that part certainly is working.
KLS and I both agreed that while the punishment system is fine and well, and can easily be changed if need be, it was missing one key, and to us logical feature. Simply, to put the player back at their previous pre-warp/zone spot. The hp/mana removal and rez effects may deter some players from using warp to travel, but it certainly won't prevent them from accessing areas of a zone they shouldn't be (like event areas in PoP zones)