Pretty much can be traced to which class requires the most "skill" to use. I think all classes have pros and cons which make them easier and harder to use. Hunter invisibility and supers give them easy kills and team revives. But they are more agility focused making it you have to focus all of your talents into getting a Titan armor stat or warlock recovery stat. Warlock's are good at orb generation and their melee is a very good utility weapon. Self Rez can be useful in situations such as preventing wipe but more often then not I see warlocks reviving for selfish reasons like dying in a easily revivable location. They have good recovery and like the Hunter, will need to focus on their talents to have strong armor or recovery. Titans are excellent team players such as the bubble. Their striker class is very good on any enemy but they can receive much hate for their abilities. Their abilities are very close ranged making their attacks seem panicky but any titan here knows that a shoulder charge is easier said than done.( I don't mean to sound biased but I main a Titan)