NH -
It's your call, the 1716 are definately over spined, but will hold up better. The Genesis arrows are 1820s and damn near indestructable. Consider the distances she's shooting at, unless the arrows are flying side ways, they are good enough to learn on, IMHO. As she develops, things will start changing - might even need a new bow in addition to new arrows!
If she's stays a casual shooter, then a "prefect" arrow flight won't be worth the time and a less than perfect is more cost efficient than replacing arrow every few weeks. That may seem like a negative take, but that's the reality.
You didn't mention how well she's shooting, so it's hard to make a call.
Viper1 out.