On the subject of combat...
As you get more abilities there will most likely be a rotation involved. It will not be a "spam" fest.
For example, even at level 7 on Archer: Keep DoT up on mob, keep acc buff up from straight shot, use heavy shot in between. Add about 6 more abilities in there and you won't be spamming anything. You obviously never played anything besides FFXI, or had no idea what you were doing in the other games you played. Since everyone keeps using WoW for an example of a spam fest, let's take a look at what a Warlock needs to do for a normal boss fight:
Single Target Rotation
Apply Agony and keep it up.
Apply Corruption and keep it up.
Apply Unstable Affliction and keep it up.
Cast Haunt when:
you have a Soul Shard;
Haunt's debuff is not applied on the target;
you will not have to refresh any of your DoTs for the next 8 seconds;
you will not need to use Life Tap in the next 8 seconds.
Cast Malefic Grasp as a filler.
When the enemy is below 20% health, Drain Soul replaces Malefic Grasp in the rotation. Doing so will grant you more Soul Shards than you can possibly spend. This means that you should always refresh your DoTs by using Soulburn and Soul Swap (this causes Soul Swap to apply all your DoTs on the target).
At the pull, apply your doTs with Soulburn and Soul Swap.
Remember to apply and maintain Curse of the Elements if no one else in your raid/party can provide the same debuff.
All classes have their own distinct strategy of maximizing DPS, if you just sat and spammed everything you'd do about 15% of what you're capable of. If SE is following in the footsteps of games like WoW and Rift, combat will be far more complicated than you may think.
Edited, Jun 14th 2013 8:04pm by Transmigration