Whether you're fully behind them or not, the changes to EverQuest II's hate system are quite significant and will have an impact on gameplay for all classes, not just the Fighters. Testament to the enormity of the overhaul is the fact that SOE has put out yet another summary of the changes, available on the EQ2Players community site. This latest clarification does not get quite as specific as Aeralik's take last week, but it does include an explanation and pictures of the new hate meter, which will form part of the standard UI when the patch goes live.
If you have aggro on a mob, your meter will show the figure '100'. For everyone else, the closer their number is to 100, the closer they are to pulling a party foul and stealing aggro. This makes it much easier for DPS and healers to see when they are in danger of drawing an NPC's attention, and they can either remove themselves from the fight for a while, or hit a de-taunt ability (which has an instant effect on the hate meter number). The EQ2Players write-up also includes a list of the changes to fighter's abilities, but for a more detailed analysis and community feedback, Aeralik's thread is where you should head.