I still don't quite understand the overblown hate towards NIN in FFXI. At the very least, it's one of the extremely rare cases of player creativity in MMORPG history. Mobs in FFXI always hit hard (as you did often group up to fight mobs 6-10 levels higher... so duh?), enough so to 1-2 shot non tanks, which essentially makes that argument flatline. The actual playstyle of the job (blink tanking) certainly wasn't for everyone, and will obviously create some bad memories for some people because of the delicacy, but it's not exactly the equivalent of the black plague to the game. Heck, you could still DD as NIN in XI, it just wasn't exactly the most cost efficient method. NIN/BLM damage was extremely good during certain parts of the game, high enough that you could potentially tank simply spamming spells based on the elemental wheel. Mind you, this was during the first several years of FFXI. Was it the best? Nope, but it was pretty funny to do something different.
Having said that though, I don't really care if it's only a DPS role here. That's perfectly fine. FFXIV is not FFXI, afterall. A SAM tank would be interesting, but oh gaud... it'll be FFXIV's equivalent of the Death Knight in WoW for a while.