No, just stick with it. There's a lot of other reasons for this and one of them is your first sentence. You use your FRONT foot to steer, NOT, your back foot the majority of the time. Second, could be upper body counter rotation. You need to keep your body aligned with the board. 3rd, you need to keep your weight centered on the board. Your probably riding in the back seat, not pressuring the front of your board properly.
If you do all these properly, it does not matte what foot you use. I was able to complete S turns second time down riding switch the first time out. Now, I'm not nearly as fast or dynamic riding goofy as regular, but I can definitely complete turns fluidly at a moderate pace.