I used to never, ever do dressage at my old barn. It was always jumps, jumps and more jumps. We rarely ever worked on the flat except for the bare minimum walk, trot, canter.
Then I moved to my new barn and the difference is amazing. I started takeing dressage lessons once a week once I got my horse. It's been a year or so since I started and everything has improved since. My horse is now ready to come into a frame which is going to be a huge goal to set because he is not what you would call the "typical" dressage horse. Before we focused on moving forward, having impulsion, and snappier transitions. Both me and my horse have improved SOO much since taking dressage lessons. Also, my jumping is so much better also. I find it much easier to adjust strides and make tight turns. I don't think I could survive riding without my dressage lessons and my dressage trainer.