Captain Smithy. Unless I missed it somewhere, it didn't say that the restricted area was only from 2500' base. Most of that area (except LTMA and around the major airports) is fine to fly below 2500'.
As fireflybob says, its gonna be a complete pain for any schools in that area, or as I was thinking, for any new pilots that have just got their license and want to "fly local" to build hours!
Ah well, what fun! I reckon there is money to be made just filinhg flight plans for students!