
Rogue:
An infiltrator with the ability to hide, camoflauge, or otherwise blend in with his surroundings in order to bypass many obstacles that all other classes must fight through.
A support class, perhaps limited to medium or light armors, and small, easily concealed weapons - nothing larger than a shortsword.
The rogue fills the niche of group spy and scout, while perhaps adding another facet to combat on the field: surprise and poison abilities.
Surprise: Allow rogues the ability skills to conceal, hide, or go completely invisible for a set amount of time in seconds; any combat or other actions initiated (other than movement) breaks the invisibility ability. Likewise, attempting to go invisible while in combat is only possible if the skill can be employed without taking any damage, or being subjected to any hex or detrimental spell effects.
Poison: Allow the rogue class to purchase or craft specific poisons that may degenerate health, inflict bleeding damage, slow, stun, or otherwise incapacitate their foes. These poisons could have limited duration and require a successful "hit" with a weapon to utilize. Perhaps these poisons may even return a small amount of health to the rogue?
Crafted poisons also provides a gold sink.
Special skills: allow rogues a sneak or surprise attack which must be initated while concealed or invisible, (obviously cancelling concealment once used) that if successful does special damage; either a single large hit, or perhaps an incapacitation effect for some time? Bleeding comes to mind.
Rock-paper-scissors model: Rogues fit in somewhere between casters and rangers; they lack the armor and weapon damage of warrior types, but can hold their own if properly played with cunning and skill.
Similar to mesmers, Rogues don't necessarily do big damage or defense, but they enhance and increase the effectiveness of their teams ability - plus the enhancement allowing for spying and infiltrations - particularly in PvP - would add an entirely new dimension to the game.
What do you think? Help flesh this out a bit.
Talesin