Only reason i see to create this class would be to get some more money from power hungry players:
at the begginging people played whichever class they liked the most, it was balanced, then with 140 cap there was a clear damage increase for RK's and assassins, a lot of people started playing those, with the 165 cap rogue took complete dominance since rk's didn't have 100% cast, a lot of people made rogues, then came the ns, reg hits + db hitting as hard as a rogue's deadline, 175 cap only brought back RK into the game, perma tb being even more deadly than deadline, since u can miss deadline, but missing 3/3 on a tb with the current possible accessories is really hard, yet again ns'es are reg hitting for 30k+ with a db now.
Sorc's were brought a bit back with the soul blessing buffs, perma deadly+ decent evasion made people level them too, then it was nerfed, sorc players either kept playing in clear disadvantage or turned into an assassin,ranger, or ns. at the same time you saw TK's starting to show up, befcause of dmg reflect. then hp patch, ns and tk no longer viable, people rushed into rogues, now that those are also capped, what is more powerful than a rogue? a rogue. go make another one lvl 175.
Guess what's next? Ex-Ex-Rogue! or is it Ex-Ex-Ex-Rogue? i'll check in a few months.