haha Walkamile, you're welcome :)
Well, it all depends on the horse. Some horses need that kind of consistancy, while others need variety. If the horse is innately more unconfident, shy, timid, etc. will probably not mind the consistant ground work. Now this doesn't mean that is all we should ever do with the horse, but it'll be fine for awhile. However, if the horse is said to be a quick learner, naughty, extroverted, playful, dominant, lazy, etc. then I would definitely move on once they get the concept. Once they get the concept, move on to something else. If you continue with the same routine it will become a drill and the horse will either shut down (as in "I'm not talking to you, you are very boring and have nothing to offer me) or they will act up and get naughty and make games of their own! It's all about balancing the consistancy vs. variety and how much to offer each individual horse.