I’d like to start by saying please understand this is the perspective from a returning player and not that of a GW2 lifer (non-stop dedication since beta).
I’ve noticed a number of pretty troubling issues that really detract from the enjoyment and potential this game could have. Hopefully I can keep this simple and to the point:
1) Grouping without a dedicated Guild is a horrible experience all around. Pretty much all groups are “Zerker, exp” or kicked. The simple fact that most groups require 1 specific set of gear is pretty bad. The fact that the game and content is designed around allowing that to even happen is pretty bad.
2) Several classes are frowned upon or outright kicked from a majority of groups (Necro and Ranger are primary two examples). While these classes are capable, they are typically frowned upon or kicked because they are outdone by other classes in MANY ways. It’s pretty bad design and balance if class is considered sub-par compared to all others. You shouldn’t be required to find a guild that will accept you as the “special boy” and allow you to play these classes.
3) Conditions. These are considered (and are) almost completely worthless in WvW and most other places as well. Simply put, it’s too easy to completely negate/remove them constantly and the time it takes to build up damage with them means the fight is already over. Honestly, based on current design, they either need to stack faster or be harder to remove (IE, removing numbers from the stack not the entire stack itself).
4) Many classes have completely useless abilities that no builds anywhere ever utilize. Engineers for example have several kits that simply never show up in community builds because they under perform vs others in every way. Necro has many skills that simply fall behind right from the start. Really, all classes do.
5) Necro Pets are barely useful in very select situations. They make the player a massive aggro magnet and puts the necro in combat (slow run) constantly. In PvP/WvW they generally get instantly killed doing no damage and leaving the necro with only their weapon skills to fight. In PvE they’re only generally useful in Solo content (if that) as again, they get instantly killed. I’m still not sure why Arena Net hasn’t realized that (like every other game) pets cannot take full damage from AOE attacks because they cannot avoid them. It’s even worse considering the player has 0 control over these. I know this is a specific class issue but I have the most experience with Necro and it was pretty sad to realize how useless these were.
6) Limit to no community involvement from Arena Net (developers). While I don’t have a lot of experience on this, it seems like the developers have almost no community involvement and feedback programs. You can see constant complaints and issues posted and no weekly discussion from the devs explaining why they aren’t fixing something… or letting people know it’s on the list and will be fixed. I’m sorry to say this but Blizzard (WoW) does a really good job of staying active with the community. People might not like decisions they make, but at least they’re talking with their players about them.