chriton227
Explorer
Four, five, or even six books a year would be a good balance.
With the current schedule, they will have released the PHB, MM, DMG, HotDQ, RoT, and the Elemental Evil adventure in the first year. By my count that is 6 books (7 if you count the Starter Set) in the first 12 months. At this point we don't know what the next 12 months will hold for their release schedule, but from what I can tell so far they are delivering exactly what you are complaining that they aren't delivering. The fact that they haven't announced products isn't proof that there aren't products in the pipeline, and people that try to make that leap of logic come across as tilting at windmills.