DRKs = Pure DPS but lack an "awesome" weapon skill. I think they should be able to tank somewhat(not for this thread) and this job has been neglected through some of the updates. I do like the mp based weapon skill idea because that would force BRD and RDM to refresh them more often.
DRG = spam Drakesbane and can just solo on it's own(thus why we never see it in parties). I would like to see the wyvern grow in size as you level up to a full wyvern(not the size of Shinryu) and do other attacks than breathe and normal round robin.
SAM = pwnage as far as Great Katanas, decent at polearm and also decent at ranged so why can they ONLY use Namas Arrow(if you have relic bow upgraded) without Ranger sub? They can also solo light and darkness skill chains so they're a little OP right now. I'm sorry but when you can use 2 different abilities, not including 2 hr, and do 2 light or darkness sc's...that's kinda OP and no other job can do it(2 light or dark back-to-back...DNC can only self sc once).
THF = having TH as a trigger ability kinda messed up a lot of things. I'm not even sure if TH works with THF as a sub. I remember doing SAM/THF and doing 1k dmg with Tachi: Gekko at lvl 66. Steal and Mug on 5 minute CDs seems kinda high to me and maybe should be at 3 minutes(or less if they're 3 minute CDs now). THF should still be the "maintainer" of enmity.