After looking over all the options in the game currently, I asked about plans for Runemaster in global chat IG. Most seemed to think that Runemaster was basically a trapper. Then, I looked up Rogue - Falconer and that seemed to have traps as a main part.
My thoughts for Runemaster, admittedly a bit bias, would be more of a buff/debuff style class. I absolutely LOVED Mesmer in Guild Wars 1, as it was truly a revolutionary type of class in that style of game. The anti-class. I would really love to see something centered around causing damage based on actions of the mobs, buffs based on my actions, and the interaction between those. A complex class, difficult to master, but strong if you can. The buff/debuff style would also make it attractive for party play.