First off, you can break the 1k character limit via editing. Reading 3 separate posts that are supposed to be a single one (especially when said posts aren't even broken into paragraphs) is just annoying.

Quote Originally Posted by Sethorus View Post
As long as there is no stealth It will work.
This I agree with for much the same reason though I'll mention that it also has a tendency to break PvE somewhat as well (mainly by allowing the stealther to skip pretty much anything and everything they don't feel like fighting). Stealth only exists in game as a DoL ability for good reason: they're not a combat class but they run around where there are often enemies so they need to be able to explicitly avoid combat to do their jobs. Combat classes don't show the same need because they're supposed to kill the stuff they get into combat with (and picking fights rather than avoiding them).

Stealth/combat avoidance is, however, something of a trademark capability of the THF/NIN in the FF series as well as across MMOs in general, so I doubt there will be nothing reminiscent of true stealth. I would expect them to have an ability that causes them to disappear/vanish for short periods of time (5-10 seconds; until they attack, of course) that acts as their enmity drop (but not complete enmity drop) and possibly a DPS CD of some kind (first attack is auto-crit). The CD and short duration would prevent PvP abuse, the lack of a complete enmity drop prevents it from being your "lol, out of combat" card, and the explicit combat benefit gives you a reason to use it more than once in a blue moon (enmity dropping/management is largely unneeded because tanks can simply generate so much so easily).

In general, I really do expect it to follow a similar general playstyle as MNK and DRG: dancing around between back and flank to maximize damage. MNK already manages pretty fast paced combat (GL reduces their GCD significantly) so I'm pretty sure it'll follow a similar model, only with standard combos and more burst. I'm confident we'll get Steal/Mug but I sincerely doubt that it will actually provide loot instead of some variety of unique resource management. I've actually got a THF/NIN build in my signature that basically lays out largely what I expect to see (the rest of the thread gets pretty deep into discussion on the top).