Frets are OK out of the box, about what you'd expect on any new guitar. All requisite wiring routes are pre-drilled per your order or what is specified on a Showcase body.
Things that AREN'T pre-drilled:
Pilot holes, if necessary, for tuners
Pilot holes for pickguard, if used/applicable
Pilot holes for strap buttons
Pilot holes for any type of jackplate, either top or side mount
Pilot holes for tremolo cover, if used/applicable