As for the comparison between the dodge, barricade and rift, all are situational, however the barricade and rift are more situational than the dodge, that's simply how they work. The rifts healing while helpful isn't very strong, nor is the overshield you can get from it, the TTK on most weapons being as low as they are, you're better off with an empowering rift but even then you need to set up and be sure people will just come to you. Barricades don't have the same strength of course, they don't give you extra health or damage but they can be useful for blocking certain areas or even useful to escape. The dodge can be used to reload your weapons or refill your melee ability as well as to escape around a corner and leave the fight. I use mine to reload and escape fights cause of how I am as a player, if I'm using a weapon with kill clip and kill someone while using my hunter, I'll dodge and keep shooting whoever comes at me next, etc. They're all different and have different uses as a result but it bugs me when people say the rift is better than the barricade, in my experience at least in y2, it's quite the opposite. I don't play my titan much as I main my hunter for PvP for obvious reasons, but when my team mates or enemies use barricades right, it's like having a bodyguard that they can walk through. It's dipping in and out of cover that you can walk through, very helpful. But that's just my opinion.

The supers are primarily what matters imo, as they are usually the game changers. Supers effectiveness is what seems to determine the meta and sometimes abilities will make the subclass as well like devour did in y1. Right now, hunters have the best supers in the game PvP wise, they're the easiest to use well and most effective with little effort or strategy. Titans have very strong supers now too thanks to the buff but that aside have still always had strong supers but required more skill to use effectively, such as the fists of havoc. Sunbreaker was always viable and anyone who says otherwise must not have noticed how many there still are even now. Warlocks just got screwed in the last big update, there's no other way to describe what happened. NW got every nerf under the sun, the bomb was buffed again to bring it up to how it literally always should have been and hunters and titans got buffed across the board with some very small nerfs on hunters that didn't affect much if anything at all. As things stand, the dawnblade is as it always has been, decent but not great since being airborne is both it's strength and it's weakness. Stormtrance remains the joke of the warlocks since Bungie neutered that between D1 and D2 and sure it can be useful and it can be good in the right hands, it requires a great deal more skill and strategy than the Spectral Blades which can just make a mad dash at groups of 2-3 in PvP. I don't need to talk about what's wrong with the NW but the bomb is still lackluster, again it's effectiveness is overshadowed by BB as it's simply easier to use and harder to dodge and outrun, not that the BB can't be outrun of course. The NB will often track into corners so in order to avoid that you need to get closer to your targets, increasing the odds that you'll either die before you get there or will just be better off using X special weapon to kill them rather than risk dying just for a super. The warlocks popularity and success rate dropped because the NW was nerfed and unlike the treatment that titans and hunters got, nothing else was buffed except the replacement skill tree for the voidwalker that still remains underwhelming because Bungie don't want to risk making another strong warlock subclass again despite the fact hunters and titans have strong skill trees, because hunter and titan mains would simply complain about warlocks being in the meta as if that's unfair.