SWAT did bappen back in 2004 or so, but they are still on the lookout for potential weight savings. If necessary a fuel tank could be removed from the aircraft as was done with F-22A (though it wasn't necessarily done to save weight) which would affect range somewhat, but it may be a viable tradeoff, if they can save several hundred kilos of weight from the design in doing so.I thought the weight reduction managment program was much earlier in the design and development phase, and one might believe that right now the F-35 design was somewhat finelized, bar some minor issues(tail hook etc) lately?
If they will have to enlargen both the tail hook, wheel brakes and the verticals stabz this late in the program, it does not sound like an weight reduction are in work, rather otherway around..
Anyway, lets wait and see how it looks like when it goes IOC.
Time will tell as you say.