It's not just the remaining 717s. There will 737s after 1/1/15.
The impetus is gone. Now that the code-share is in place and SWA has gotten a taste of the $ to be made with bag fees and business-class in and out of the Florida/Caribbean market they aren't in a hurry.
There is no way this management group will park even one revenue generating airplane. 30? Not a chance in h#ll.