We were seriously thinking for switching from Deluxe to Premium for our July trip, but decided to do the Premium next year. There's going to be 11 of us this summer, and not everyone will enjoy the same activities (ages 14 - 70) Next year, we will return with sister and her hubby. For the price of about $150/pp/night that gives you 3 TS credits a night (signatures count as 1 TS), 2 snacks and unlimited recreations and tours. I would suggest that unless you will be eating 3 big meals a day, why not take advantage of a little loophole in this plan. Since the meals credits are not per day use and you may use any un-used credit until MIDNIGHT of the day you check out (recreations and tours too), book a 5 night-Premium Plan Package and add-on an extra night with a room only reservation. You will be saving $300 among the two of you and still have plenty of food too.
Examples of recreations and tours costs:
Golf (18 holes) runs about $200/pp
Le Cirque (cat. 2) ~$86
parasailing $120/pp
Segway tour @Epcot $95/pp
horseback riding $42/pp
Whatever you decide, you will have lots of fun, but let's hope my suggestion saves you some $$$$.