1. Not unless she plans to return after August 2017.
2. Your wife can go for stamping if you'd like but it does not appear necessary. You should not withdraw her pending request. Rather, you should file an RFE response ASAP.
3. Your wife will be given an I-94 with a maximum stay that is equivalent to yours unless her passport is expiring before the H-1B expiration.
Answered on Nov 04th, 2016 at 3:32 AM