Vsync is a very poor substitute for an fps cap, and in fact, decreases the fps and smoothness of the game considerably. I urge you to play the infantry showcase with both vsync on and off. There is a double digit fps difference, and i can feel extreme stutter and sluggishness with vsync turned on. Alternatively you may look into improving vsync, but from experience, its difficulties far outweight its benefits. It would be simpler, less complicated, and less burdensome to implement an fps cap and be done with it.