At launch played lightning sorc when obviously at that time, they weren't super great at much but AOE dps. Swapped reasonably early on to Mara DPS and held that as my main ever since. Never had an issue battling as 1st or 2st place DPS in any group once I was attuned to fights and had the time to get used to it.
These new fights are absolutely busted against this particular class, and as many have noted against all melee except arguably PT or Sin DPS. For simple reasons. For PT, hydraulics + range DPS capability, plus AOE in the form of conal flame attacks that make it so all you have to do is position and click.
With assassins its similar, but even easier... Death field. Period. Look at torque in HM for example. Sure a sin there will eat as much DTPS as I would on my mara (approx 1400-2k depending on how awful placements of fires are) and in that same scenario, the sin can do 4k DPS relative to my annih/carn DPS tops of around 3400-3600 with rare exception. Why? because death field is an aoe they can plop down and hit Torque, Shootslasers, and 2 turrets without even trying. If they ARE trying and the position is great, they can hit 3-4 turrets on top of Shoots and Torque. Boom you suddenly have dots ticking in addition to a solid 10K+ hit.
A marauder meanwhile has dot spreading through smash which I would be BLESSED to hit 4 targets on, most conditions of that fight would allow you to hit 3 targets... A couple turrets and the boss or shootslasers, because the boss isn't static very often without fire and then tank movements. You simply can't compete in this type of environment. Even sweeping slash with an upgrade, even in carnage, lucky to hit 2 targets at a time. Why? Because turrets attract to melee range targets automatically, meaning I am simply a healing liability when I stay within range to hit 2 of them with sweeping. That's right, 2 is all I can hit. Because if I went to try and hit them with the boss and/or shootslasers, I am about to get annihilated by fire so I have 1 GCD or 2 at most before that happens, additionally the tanks then need to move Torque to new position around the time shoots drops and turrets come out anyway to make room for the repair droid. It's a lose-lose for a marauder ability set.
This is just one example of where sweeping slash and/or dot spreading/DST are worthless abilities relative to the advantages of the shape and ease of use for sweeping blasters, DFA, suppressive fire, DEATH FIELD, and none of this is even considering how OP force storm obviously is today.
As an annih mara for so long including through prior content in NiM progression, I can honestly say that in the new content only a small number of fights allow competitive numbers due to a combination of downtime as well as AOE opportunities. Those fights are:
Malaphar, Sword Squadron, Master Blaster, Rev Commanders.
That's about it, whether you lose out to add opportunities that spike rDPS numbers or terrible uptime relative for a melee... And frankly when competing against competent range DPS (In my group 2 snipers, a sorc/merc that interchange) I am lucky often times to beat them even in those fights, if they play their cards right, they can utterly keep pace with me without breaking THAT much of a sweat.
Please BW, do something about the melee classes you left out to dry.