Neverwinter has been on a downward spiral since mod 6 Mod 16 seems to have at least made a sincere step toward balancing the classes in pve and expanding play style options for a few classes, but it also took away play style options from others, broke a lot of synergy between gear, feats and daily abilities, made the awful decision to expand scaling throughout the game and rewrote some old content in such a way as to make it unplayable or barely playable (10 person Tiamat, idiotic perma stun ice in FBI, even VT is difficult without an endgame level player since newer players won't know the final boss mechanics, which by the way don't work anymore since even I can barely scratch a soul casket or whatever they're called).
PVP has been pointless for years. There has never been a sincere attempt at class balance in pvp and all we seem to get is overpowered control, boring one-shot and one-rotation kills, and from a ranger's point of view eternal neglect of basic problems with our class (slow movement, long animations, animations that break stealth abilities, the ever-irritating small dodge combined with lack of stamina regeneration, endless nerfing of control and escape abilities, and so on).
Loot tables for old content reward pointless, useless old items.
Loot tables for newer content aren't much better.
Professions were redone in mod 15 then made completely irrelevant one mod later. It's hugely tedious to log in with all of one's characters just to make RP. I'm tired of having the rug pulled out from under me after redoing my build, obtaining new gear, or in that case retooling for professions and getting up to MW III in all professions just in time to have them made pointless. I'm glad at least that I didn't invest, i.e. waste - the time and resources to go farther than that.
The random queues have been poisoned with content that newer players simply cannot understand and/or cannot handle. Entry gates are too low or difficulty is too high. This means increasing reliance on custom channels to form a group even for random queues, since the queues no longer serve their basic purpose of providing easy AD and loot for everyone who gets in line.
The RAQ should not include CR and CODG. They need to be moved back to REQ.
Endgame level player population is a small fraction of what it was before mod 16, making it yet more difficult to do higher-end content. No one likes sitting around spamming chat channels for 45 minutes just to put a group together. I'd rather go without that part of my AD for the day than waste that much of my life doing nothing in a video game.
The do-an-expedition-and-hope-for-the-best-from-Zok model is boring. I've thought for a long time that the game should just let us set a goal, be it a certain piece of gear, epic insignia, mount, artifact, or companion, and earn it by playing content. No one likes the RNG and it certainly doesn't like us.
Having to grind a few runic corruptions a day to maintain my supply of runes is boring.
Having to sort through all the loot I picked up to sell it or refine it piece by piece because refining equipment is now broken is boring.
Constantly discovering new bugs or new bad design ideas in old content just makes me not want to bother.
Tales of Old is full of bad ideas and bugs, and I don't even bother with it.
All the new environment designs are terrific. Unfortunately the game hasn't gotten much else right these last few years.