Yeah, pretty much. Titans are still very viable, don't get me wrong, but both Hunters and Warlocks are definitely better. They have better abilities overall. Titans Strikers have really good grenades (lightning) and that's about it. Their supers (i.e., WoD and FoH) are lackluster when compared to the others. Hunters have the best supers. Warlocks have the best melees. There's a reason why Hunters and Warlocks (in that order) are the most played classes in PvP. You can notice this yourself when playing pvp. Every match is packed with both and it's rather rare to see a Titan. Failing that, look at the destiny tracker leaderboards, chalk full of Hunters and locks.