I think that's going to suck. How is that even going to work? I knew we had cooldowns in gw1 but that's so you don't spam that specefic set of skill. But without mana, say if the cooldown period is one sec, couldn't he repeatedly use it without any consequences? That would be devastating in pvp no?
Your first attack can be spammed (in fact, it can be set to a mouse-button unless that's changed), but the other abilities are on different cooldowns, some longer than others. For example, the Warrior's Greatsword Abilities are "Hundred Blades" (6 second cd), "Whirlwind Attack" (12 sec), "Bladetrail" (20 sec) and "Rush" (20 sec). So the only really spammable one is the first attack (which is actually a chain attack).
Utility skills tend to have longer Cooldowns too.
So in other words, you are capped more than you were in gw1? Less freedom? So you get a pre-set of skills determined by your weapon and you can't change those pre-set skills? Do they a wide range of weaponry though?
There are 19 Weapon types:
One Handed: Sword, Axe, Dagger, Mace, Pistol, Scepter. (Some of these can be wielded in the off-hand, so Warriors can dual-wield swords, axes, etc.)
Off-Hand Only: Focus, Shield, Torch, Warhorn.
Two Handed: Greatsword, Hammer, Longbow, Shortbow, Rifle, Staff.
Aquatic Only: Harpoon, Trident, Harpoon Gun.
I didn't mention it earlier to avoid confusion, but the first three skill slots (1-3) are determined by your main hand weapon, while the last two (4 and 5) are determined by the off-hand. (If you're using a two-handed weapon, that dictates all 5 slots; thanks Gunbo) So you can have a Sword, Axe, Dagger, Mace, Pistol or Scepter and then a Shield, Focus, Torch or Warhorn (though obviously your choices are restricted by class. You also have two weapon sets available and you can quickly switch between them at any time (including battle). So if you have a Sword and Shield in set one and a Longbow in set two, you can swap back and forth as the situation demands (there's a 5 sec. cooldown on swapping though). Some classes have different approaches to equipment (the Elementalist, Engineer and Thief mostly) but I won't muddy the water further in the interest of keeping your sanity.
The level of customization has been a topic of discussion here for the last couple of days, so let me say that your equipment options are also further customized by Traits and weapon bonuses or modifications. But yes, it's definitely a step back from the volume of skill choices in GW1.
I can't come to that conclusions yet, but once I know. I will let you know.

But so far, yes.
Well, I didn't mean it to sound like a bad thing, It's just that when you look at the major cuts from GW1, you kind of realize just how much has changed. The people who are okay with the major changes from GW1 justify it by saying that there's just a lot more going on in GW2 that players need to be aware of. The biggest thing to remember is that GW2 is a different beast entirely with more emphasis on stuff like real-time dodging, positioning/controlling enemies, environmental weapons/traps and cross-profession combination attacks.