Ok, based on the pics from Carfields pics from the trip report, it appears that all of New Castle's terminal is quite spacious (exception baggage claim) including the boarding area. Seems like Wilmington is a winner for F9. Hopefully the coffee shop will open longer hours as they see all of the pax from Frontier.
As F9 makes the transition from LCC to ULCC I hope it doesn't go too far ala Spirit with their horrendous 28" seat pitch in the A320. For cheaper fares and local airport convience I can pay for more things like drinks but I will not fly on a sardine can.