I have only played as a titan but I feel pretty powerful in pvp. I do seem to get the odd match where I am simply poo (things don't 'click and I do badly) , but very often I get around the 1.4 mark, or higher, so I am happy enough. My only qualms are that warlock baseline melee is better than titans; that people can run far too long a distance with blade dance; and fist of havoc had a bad habit of landing on walls or trees. But I'm sure every class had their pet hates.