As much as people here complain about the hassle of park reservations at WDW, I think they are a huge deal breaker - especially being locked out when dates fill - at DLR and has lead to much softer than historical demand for APs there. of course the dynamics at DLR have always been dramatically different than WDW in regards to number of APs vs day guests/resort guests.
Don't forget, Annual Passholders won't need to have park reservations after 2pm starting April 18th (with the exception of Magic Kingdom on the weekends).