It just adds up some content, you're not missing anything from the original game.

I'm looking to complete the Highridge set for engi, I can buy or trade for something you guys may need if I have it. So far I have Boots, gloves, shoulders and belt.

Oh I forgot: Please let us link the items at the chat, we wanna show off!! :D
Also make possible a better use of the chat by adding more tabs where you can see combat log and, if it's ever possible, clan chat, friends chat and whisper

This game made me stop playing GW2. Enough said.

I really hate how multiplayer is managed. I love the game but seriously, that's a really really weak part, and mostly considering this game a heavily multiplayer-oriented. Please make a much more complete multiplayer hub, where you can manage your friends, see who is adding you (seriously I can't believe that you send a friend request and still need to notify the guy by chat or mail or however else, to add you back), check the games made by friends, if possible some clan creation and managing, and also solve some issues with the games being impossible to join if anyone leaves them. There are a lot of MMOs out there to get concepts from, as the multiplayer interface NEEDS a HUGE polishing. Make it and the game will be 10/10

Engineer, and I'm pretty sure I'll play a couple builds more until I change class, it's so awesome! *_*