I suppose on what sound you'd like to achieve from this customization, each to their own on body woods, necks, frets, hardware and electronics.
Personally, I like the Gibson TBird as it is. I think for myself to customize a Fenderbird, I'd add a jazz neck with rosewood frets and change to a badass bridge or something just something simplistic and what everyone's used to but as mentioned, everyone's different
BSB