Locks are very good at this point of the 10s bracet. With loads damage as Nature just said, locks are one of the best classes to burst in duels. Tho with scaling in bg's locks wont be as bursty, but they still in bg's to one of the best damage dealing classes in the games.
Locks also got something speciall making them even more op. The Imp you as a warlock dont just make loads of damage. The Imp also removes stunns from paladins. This is something making it very hard to cc a lock. That makes them an even better class at lvl 10.
Hope this helped! Cya bro!