Thanks for checking! We were only planning on doing Epic this trip and skipping the rest of Universal so hopefully they release a 1 day pass or I may need to change my plans.
Universal is going to release multi-days multi-parks tickets for everyone for 2016. My guess is that they're delaying because they don't want to hurt Christmas bookings (people delaying vacations to be able to buy more flexible tickets). But they won't be able to delaying for much longer, or they'll hurt early 2016 bookings.