You are able to select your seats when booking on points.
This sounds like a domestic flight where there are only two classes. If you don't have status then you'll have to pay for an Economy Plus seat the same way you would when booking with cash.
I would expect you'll see some kind of points savings since you're a card holder.
Luxury & Adventure Family Travel Agent
Personal Travel Concierge
Europe • Africa • S. America
www.voce-travel.com
Kyle.regitz@fora.travel