Its a challenge as things are now. Atm its the poorest class in the bracket at 60, as you play in 70 you will know their in a rather bad place at 70 but its even worse at 60.
A well played/geared 60 lock just cant beat a well played/geared rouge/prot pala/mage, even with full resil stacking you will die before you can say nomnom. Only way to work it is team play. Left alone they are actually okey dmg wise so with a disc priest backing you up i can def see it working.
As for soloing? If you beat any other class its because you are the better player/ got better gear, every class in the 60 bracket would demolish any lock if they where skilled/geared.
Locks takes me between 0.5 and 1.0 sec to kill as ehn when i have lifebloom/ swarmguard/gabbar popped and just use stormstrike. Even resil stacked 64 locks are still soft targets sadly.
"if 60 rogues are anything like 19, as soon as I can get out of the opener I will be fine."
Sadly not at 60 they have Garrote, Cheap shot, Cos, preparation & blind. Sort of like 70 rouges - shadow dance. The dmg is high at 70 hence the short arenas but even more so at 60, chances are after you get out of that opener you are at the spirit healer. The rouges go full agi just like 70 tho so there is some hope they are squishy aswell and can drop just as fast when they got their asses exposed.
Its a challenge to play a ub class and that makes it worthwhile, no fun in being durp op; I tryed a 64 blood dk and that was fun but it got old real fast. Plus class mechanics/balance/brackets are not set in stone. And mop will bring some major changes across the board.