Zendikar also had a minor milling theme that was cut back a bit in development (although the Hedron Crab is nothing to laugh at.) In the early days there was some doubt as to how much popularity milling has, but every time we've made a push towards an exciting milling card, the audience has been very receptive
You must also have priority to cast a spell with flash
The other Ancient Tomb is a lot less painful and may be tapped many more times throughout the course of a game than you are able with Tomb
That bodes well for her chances, I'd say
A quick note on pull tabs or "post it notes/etc" to make it easier to pull the card out
In practice, however, it was awkward, board-state-dependent, color-restricted, and about as intuitive as explaining Banding to someone who had just learned what a land does