I was on SZ and VZ before coming here, spent my whole time on EQlive on pvp servers, and while I do enjoy pvp to a certain extent, its also true that pvp was incredibly buggy and unbalanced on eqlive. Pvp was always playing second fiddle to other bugs, and so pvp bugs would often last for years, even ones that were just totally ridiculous and gamebreaking(charmburn for one, those from SZ got to enjoy that for like 1.5 years). As much as I love pvp, I would not want to see it here on approaching a pvp server scale, or in any way mandatory for any raid or xp zones, unless alot of work was put into balancing it. Seeing that this was never done even remotely correct on Live, I really dont see it being worth the time here.
That being said, it would be neat if duels were in, so people could do it voluntarily just to goof off. LIke prathia said though, it was causing zonecrashes ad we have alot of other things Id rather see in or fixed before duels