“The Fifth Fleet is a key component of US military power in the Gulf. Possible alternative locations include the United Arab Emirates and Qatar. However, neither has the current capacity for the fleet and a potential move remains some years off.” This is BullFeces! Jebal Ali UAE IS HUGE(you could put the ENTIRE present US Navy there and have LOTS of room left(easy access to the IO too). http://en.wikipedia.org/wiki/Jebel_Ali
http://en.wikipedia.org/wiki/Port_of_Jebel_Ali
Sure, if you took over the entire commercial port, but that isn't going to happen. The fact is, there are a lot of logistics and facilities at Bahrain that are not at Jebel Ali and those would take a while to move. It's more than just berthing space.