Personally, I prefer a traveler car that will stay put under load. Nothing worse to me than sheeting in and having the car come towards you instead of sheeting tighter. I find it pretty easy to crack the main a bit, travel and then sheet again.

On the bigger cats where a crew might use the traveler more, a smoother motion would be needed, but I don't think too many Hobie 16, 17 or 18 crews are or should be working the traveler upwind.