Right,

Pallies have no defined role, and truth be told, they have not had one for a while and there is nothing that says that they will get one.
* Pdef is absolutely useless in this game, say compared to e.g. Lineage where it actually means something.
* Health means that you can take some hits, but this is not really tanking now is it; tanking means being able to withstand hits while keeping aggro, something the pally has no actual skill for, unless one counts using repentance to pull a melee class to you. After a rather abrupt cutoff, extra health is obtained by +'s on your gear.
* The skills are PVE-oriented as others have mentioned, and this is most evident in the worthless 'hate' skills which you cannot use on players; yes, other games - where tanks are useful - allow you to actually 'provoke' enemy players, and keep their aggro for a while. Might seem easy to implement, but then again, it might seem simple to fix some of the bugs that have been there since beta.
* but you can of course heal now, have fun with that *pat on head*

GMs testing the game is absolutely adorable and admirable but considering that this level cap has been out in J/K-AIKA for quite some time now, there's very little chance that anything will change. JAIKA-players had the same complaints as mentioned above, but nothing happened, because Hanbitshit isn't exactly known to cater to anyone else but themselves. (also, you might want to question how willing they actually are to develop something for this game considering that the two biggest iterations of the game have something else than the 5-nation system - i.e. the player base has grown tired of it; the pushing out of large amounts of content in this iteration might have something to do with that, considering that they probably want to get everyone on the same expansion quickly to streamline the non-existing support).

Damage inflation - the trend that damage increases more than the ability to heal/tank/ignore - will continue; there is no incentive for them to cease a profitable scheme where damage mitigation occurs by money sinks - be it in-game or actual currency. But hey, as long as you get a cool glow and high numbers when you hit right? If you want to tank as a pally, you better have a lot of pluses on your gear. Do not think that this is not intentional, the extra piece of armor, and overall low base pdef and health, is there for a reason, and it ain't to look purdy.