I agree with David. I think it will mess you up to shoot something as different from Trad as a compound, but better to be shooting anything than nothing at all. There is obviously going to be some carry over; however, you are still counting on muscle memory to shoot instinctively, and that depends on the same motions and forces being basically repeatable. A compound bow, by design, has a very different force curve and feel compared to a recurve or longbow. Fred Eichler shoots both, and no one can say he can't shoot traditional equipment well, but I doubt Fred spends much time shooting his compound. Bows with sights don't require much practice when you have been shooting a trad bow instinctively. I think of a compound bow much like I do my rifles. If they are sighted in correctly, I can hit what is in my sights, provided I know the distance to the target and it is within the range I am competent to be shooting (like 60 yards with a compound and 400 yards with a long range rifle). Of course, I rarely shoot a compound -- only when one of my wheelie buddies wants me to try out his new bow, and then only at targets.
Allan