Alright. Are you sure you want my honest opinion? It's going to generate a lot of nerdrage in the thread. So if you're prone to raging about GW 2 I would suggest you not even bother reading this. It's a inuitive, experienced eye closely examining GW 2 under a microscope. Call it opinion if you want, but these are actually educated, grounded conclusions that anyone who is looking should come to.
GW 2 - Looks promising, but ANet is pulling a massive trick on everybody. It's not nearly as cool as any of you think it is. The combat system is actually more like the norm than you would believe. Almost everything I have seen of the game so far indicates that it's basically just GW 1 with upgraded graphics and a slightly upgrade system of combat. Let's take a close look at it, shall we?
Ok, let's start with the 'dodge' mechanic that everybody goes to right off the bat.
It's useless and isn't nearly what most of you probably think it is. If you think that the dodge mechanic is a simple tool to perhaps cover a little bit of ground that is to be used sparingly, then that's what it is.
If you think it's a super amazing mechanic that allows you to carefully and precicely dodge any attack, you're wrong. I have seen the game played IN PERSON AT A PUBLIC EVENT. I have also watched every single video available on youtube and carefully examined them. Nothing I am about to talk about is under NDA; it's public record.
Ok, now that that's out the way I can say this: The 'dodge' roll in GW 2 does not prevent you from taking damage AND it consumes a fair amount of energy. There is no weapon arc collision detection in the game. Instead, everything is basically a small area attack. There are plenty of videos out there where you see the focus of the camera rolling around all over the place, but still taking plenty of damage.
The roll is mostly to put a little distance between you and your target. What is nothing more than an escape ability in any other game has somehow become a 'unique mechanic' in GW 2. This is not the case. Plenty of other games have already done this and some even do it better from what I've seen.
In GW 2 you still have a hot bar. You still spam buttons. Hell, from what I've seen you actually seem to end up spamming one button most of the time. The hot bar is set up exactly like GW 1, so anyone familiar with that game should know what I'm talking about. You end up spamming one ability the majority of the time (sound familiar? it should)
As far as the quests go - How is what they're describing any different than what GW 1 currently offers? I, for one, got really sick of all the running around. To the point that I didn't want to make any alts.
TL:DR
GW 2 is shaping up to be mostly a rehash of GW with things that ANet probably wanted to do with their first game. The most significant ADDITION I have seen is more of an open world. Nothing else has jumped out at me as being all that different from GW 1. If you don't want to take my word for it then, please, go to youtube and very carefully watch the videos.
TERA
Since Tera is released, there is no NDA to worry about here. Though this info is all based off of the Korean live client. Take it as you will.
So far - The combat is amazing....that's about it.
Someone else summed up it's problems nicely. The dungeons are really easy and kinda boring. Leveling is remarkably short, which is good all things considered. And the PvP system is completely trashed at the moment. It needs a pretty fair amount of work, but if they can fix these issues it should be a pretty interesting game. We'll have to wait and see.