With the Rotom formes having lost their Ghost-typing, Lucario can now slaughter them with a boosted ExtremeSpeed or Close Combat. For instance, a +2 Adamant LO ExtremeSpeed does 86.36% - 102.07% on a 6 HP/0 Def Choice Scarf/Choice Specs Timid Rotom, a OHKO more than 92% of the time provided Stealth Rock is in play. Slower, more defensive Rotom sets are met with Close Combat for a swift OHKO.
Previously, thanks to Intimidate, Lucario couldn't OHKO Salamence with ExtremeSpeed, even after Stealth Rock. But now, If Lucario switches into a Choice Band/Choice Scarf Tyanitar's Crunch and gets its Justice Heart boost, it can OHKO 6 Hp/0 Def Salamence with a +2 LO ExtremeSpeed. The same goes for 6 HP/0 Def Gyarados as well (SR is need for both examples).
Checks for the SD set like Hippowdon and Scarf Heatran would be destroyed by a +2 LO Aura Sphere or Vacuum Wave, thanks to Nasty Plot. Vacuum Wave also handles Sazandora quite well.
Lucario is looking to be a fantastic Pokemon all around, much like it was in Gen. IV.