There are a few bases that can actually be locked down. You just need to know how to get inside them. For example the Shuttle bays on Hoth used to cause alot of fighting but now since 1.1 the shuttle room is not a contested zone any more. Only reason people are doing Warzones is to get their gear mainly since the valor farm on Ilum is much faster now. IMO they some remove this PvP armour junk. You PvP to have fun and to be competitive, not to grind gear. This game threw that out of the window when the PvP gear came.