Hmmm, for what you are shooting for I think you have made the right choice in going to Vail. The saying is "same old blue Vail" which refers to it's over abundance of intermediate terrain. It's a fun mountain. Of course they have a large beginner area, but when you lady is ready to try the next level, there will be plenty of it for her to explore and find what she likes. Also, besides for a couple of lifts, you should be able to get away from the crowds. Vail is a huge resort and has plenty of room to spread people out. It's what you want.
Now if you were staying in "Denver", recommendations would be totally different.