Tweaking the shades of blue and gold and a one off black uniform is fine, but a full change to black and gold is stupid. Logo wise the script Pitt should be used in all sports and I'd rather see a full Panther on the prowl as the secondary logo.
If I was in charge here's how I'd do things.
Football
Jerseys: Blue, White(would wear at home for day game early in season), Throwback(once a year for homecoming), Black(one night game a season).
Pants: Gold, Blue, Throwback, Black(one night game a season), burn the white pants the white on white looks like pajamas.
Helmets: Gold(script Pitt, blue/white stripes, blue facemask), Blue(script Pitt, gold/white stripes, blue facemask), Throwback, Black(matte black with chrome gold prowling panther and facemask)
Basketball
Jerseys: White(script Panthers), White(script Pitt), Blue(script Pitt), Blue(script Pittsburgh), Black(one game a season, script Pitt), Gold(script Pitt).
Baseball/Softball
Caps: Blue(script P), Blue with Gold bill(script P)
Jersey: Solid White(script Panthers), White w Blue piping(script P), Solid Blue(script Pitt or Panthers), Grey w Blue piping(script Pittsburgh)