Agreed. But it's not just one E Ticket needed at each of the parks. The Magic Kingdom and Epcot both need at least a half dozen more rides each, with several of them being E Tickets. And DAK and DHS both need a dozen more rides each, with a few E Tickets each!
A dozen more rides per park, if they really want this MagicBand FP+ thing to work with the annual attendance the WDW property pulls in each year.
Disneyland Resort 2012 Combined 2-Park Attendance - 24 Million
Disneyland Park - 46 Attractions, 36 are Rides, 11 are E Tickets
Disney California Adventure - 31 Attractions, 21 are Rides, 5 are E Tickets
Anaheim Property Total - 77 Attractions, 57 are Rides, 16 are E Tickets
Walt Disney World Resort 2012 Combined 4-Park Attendance - 48.5 Million
Magic Kingdom Park - 34 Attractions, 25 are Rides, 7 are E Tickets
EPCOT - 23 Attractions, 8 are Rides, 4 are E Tickets
Disney's Hollywood Studios - 15 Attractions, 6 are Rides, 3 are E Tickets
Disney's Animal Kingdom - 13 Attractions, 7 are Rides, 4 are E Tickets
Orlando Property Total - 85 Attractions, 46 are Rides, 18 are E Tickets
Anyone who has ever spent more than 3 days at WDW could have told you that WDW needs more rides for MagicBand FP+ to work. But it's increasingly obvious that the people who approved MagicBand FP+ in Burbank have never actually spent time in the WDW theme parks as a paying customer. That's just very bad executive management, nothing more. Burbank bosses quite clearly don't know the theme park business very well.