The more I play the less I like GCD.
Issue: same as many others. There seems to be something that causes you to press a button that looks ready but in actuality is not. Very frustration considering my current aggravation. I'm not going to go into much detail about it considering many others have pointed it out. Just letting you know another player has the issue.
My understanding is that GCD was implemented to reduce lag and fast leveling due to skill mashing, yes?
Suggestions (that don't involve GCD): 1) increase amount of XP needed to level and/or require players to have finished a certain amount of quests/difficult task.
2) Introduce an option that removes skill animations. By reducing what your device has to tolerate it will be faster, yes? By removing the animations lag will decrease (I've had this option on a different MMORPG and it helps a lot).