It's hard to say definitively right now. I kind of want to see things in action, or at least know what skills DO.

Some things to note:

- All Tanks can support the party in some way, including "Supporting the MT" which is nice, given that PLD's prevalence in the meta was entirely because of their monopoly on skills that allowed this.
We'll have to wait and see exactly how this pans out though, like what tools does each Tank have? How effective are they? Will PLD still have like 100x more skills to use and we'll still be in exactly the same situation as now (Where DRK has TBN to support the MT but PLD has Cover + Intervention + Clemency + Passage of Arms + Divine Veil which can all be used to support the MT)

- All Tanks have a gap closer. Not particularly "Necessary" but it's nice to have. Will need to keep an eye on the details of this though, lest DRK's continue being salty that they can't use their gap closer for movement because it's a DPS boost to spam on CD because it requires no resources and is oGCD... (While Onslaught is a DPS loss outside of regaining uptime and during IR)

- DPS Stance removal and Tank Stance penalty removal. Pretty nice. Not my preferred option, but better than having a vestigial Tank Stance with a penalty attached or some sort of "Force the MT into Tank Stance with Penalty" crap (Which far too many non-Tanks were suggesting... Heck off with your penalties for us doing our job!)
This coupled with the "Rotations don't change between MT/OT position" cements the "Not my preferred option" state. Would be nice to get some variation between the positions... Oh well, maybe in 6.0 if they get Tanks actually balanced in ShB.

- TP removal = Weaponskill are now free. Ehh... I guess... Makes AoE nicer for PLD/WAR so you can continue to spam AoE's without running out of TP. Even more so now that WAR has an AoE combo to be able to generate Gauge making AoE spenders more usable.
RIP DRK's AoE though... Though, no more Dark Arts so I guess Abyssal spam is improved? (Or removed I don't think I saw Abyssal in the Job Actions trailer and only saw Unleash and I think a combo for it? Maybe they're now Weaponskills though and thus are free?)

- No more Main Stat melds. On the surface, this is fine. However, my cynicism tells me that they're going to do us dirty with Accessories (Again) and now we can't even fix it with Penta-Melded Crafted items >.>

Anything else, will have to see when skills are detailed. I'm curious to know what's happening with a lot of skills. Equilibrium? Inner Beast? Gauge Passive? Unchained? Maim? That "Feller Cleave" thing?