There's no such thing as perfect, especially in the airline industry. However, jetBlue does offer a great product and service - but as always, there is definitely room for improvement.
My number-one suggestion that I admit to be stuck on is an inflight magazine!!! The start-up cost will be the major investment, but once it is going, the actual production costs are not so terrible. jetBlue could bring in some nice ad bucks since advertisers would be interested in having that captive audience.
Suggestion # 2 (which has been discussed here and in other places several times): Allow customers to view the aircraft seat map before purchase! I think it will happen soon, it's on a matter of time. Kind of related to this...it would be nice to have the equipment type (E190 or A320) on the time tables and when viewing itineraries before booking. For those who are not as familiar with B6 as us FT-er's, it would be nice to have that info there.
Suggestion # 3: It's a little far-fetched, but can easily happen. Remove one additional row of seats from the A320. However, only do this on a portion of the fleet - this reconfigured mini-fleet can be used for transcon flights only. Since these flights burn the most fuel, tech stops are some times needed in the winter when the jet streams are unusually strong. 6 less seats = less weight due to less seats and less bags. Also, one less FA is needed when the plane has 150 total seats, as per FAA regulations. Therefore, everyone wins: jetBlue wins by not having to spend so much money making a fuel stop enroute, paying 1 less FA per transcon flight and by burning less fuel and the customer wins by all rows having equal legroom at about 34" pitch, which is amazing!
Suggestion # 4: Internet on board...jetBlue won the auction to provide the service and when it does happen...I think jetBlue should definitely charge (some kind of price structure, for example, like: $5 on flghts of 1 hour or less, $10 on flights up to 2 hours, $15 on flights up to 3 hours and $25 on flights up to 6 hours). Also, as an incentive and to take care of very loyal customers, jetBlue can offer promos with this service to existing TrueBlue members AND jetBlue AMEX card holders! For example, offer the service to jetBlue AMEX card holders free for one month of the year. TrueBlue members can be offered a discount such as 1/2 price for one month of the year. Also, this will further improve the inflight experience...for example, in the few cases that the TV does not work, jetBlue offers the movies for free...they can do this with the Internet as well and there is one more IFE option at no charge on such flights. Same goes for flights that encounter very long delays.
Suggestion # 5: Continue to offer the Bliss Spa kit on redeye flights for free...however, offer the same kit on all transcon flights for say $3 or whatever would more than cover the cost to bring in a few more bucks. Also, sell the kits in scattered vending machines at airports like LGB, OAK, BUR, LAS, JFK, BOS, IAD, FLL and MCO.
Suggestion # 6: Have ONE "Name the newest plane contest" for all TrueBlue members. Award the winner with a prize like free flights for you and a companion for one year (maximum of 12 roundtrips), a framed photo of the winner in front of the new plane with the name and of course the trip to Brazil or France.
Suggestion # 7: Advertise more heavily on college campuses (I know they are trying, but there is still much turf to be covered).
Suggestion # 8: Sponsor more sporting events (jetBlue used to sponsor some things at the Yankees...what happened to them there!?) MSG...Knicks, Rangers, Boston...Celtics, Washington...Wizards.............there are many opportunities in the sports area to advertise!
Suggestion # 9: Hold a "jetBlue Trivia" game with prizes to be awarded for jetBlue fans!!!