BJB - are you hoping that the hobble training will help her to stop pawing when she is tied? I'm not sure that it will, if that's the intent. The two are different animals. And I would never leave a hobbled horse without supervision, so it's not like she will learn to be quiet when left alone with the hobbles on.
I do hobble my horse and if I ever get another horse, that one will be hobble trained as well. I think you can continue to hobble her daily. Unless she has other issues with her feet or behavior in general, I don't think she will get fussy with her feet over being hobbled daily. However, a small bit of hay to keep her occupied might help :)
For the pawing while tied, I would reprimand her. I know you said she does it when you leave, but if you only make it look like you've left then you can still interact. Go around the corner and if she paws then tell her NO! Don't go back to her until she stops. If NO! doesn't work, maybe you can get into a position where you can reach around with a long crop or whip to hit her legs when she paws. You know what discipline works with your horse. The trick is to make her think she is being watched when she really thought she wasn't being watched!