Whoa whoa whoa
Whoa whoa whoa. Lucario is NOT outclassed by Scizor whatsoever. First of all Extremespeed is much better than Bullet Punch because Normal hits a lot more things neutrally. Most of the things that resist it are either slow steel-types, all of which are slaughtered by Close Combat, or Gengar/Tyranitar/Terrakion, all of which fall to a +2 Bullet Punch, or Jellicent, which dies to Crunch. You do have to choose between two of Lando-t/Gliscor, Jellicent, and Gengar/ScarfTar/Terrakion beating you, but compared to Scizor, Lucario is much harder to wall because of Close Combat.
Lucario can set up against choice-locked Pursuits, choice locked Draco Meteors, choiced Ice moves (it makes a great partner to DDNite or Latios), as well as against Ferrothorn and Forretress. Not really sure why you are comparing a CB STAB move to a LO priority move, but w/e.