Anyway....lightmap aside. Game is unplayable without enders. On what I consider to be a medium size farm with a couple dozen pieces of infrastructure in 800x600 I get 6-9 FPS on my AMD E350 laptop (4Gb Underlatencied 6-6-6-18 DDR3 1066 & Intel 320 SSD). With enders, hide can take it to 13-15 and zoom up to 20.
Without enders I can't negotiate travel around my own fucking plot. Since object information seems to be recieved by the client on a charecter radii I don't see thing like zoom and hide doing anything but taking away the rediculuos ability to hide stupid shit (and murders, sadly) behind things.