I have to agree with Squid, Diggersby has some cool uses and may find a very useful niche. Do I think it will be OU? Possibly. Only reason I'm saying that is the prevalence of fighting types in UU will either bump it to OU with a good niche or relegate it to RU. Either way, I feel Diggersby is one to watch out for (btw nearly every Aegislash carries Sacred Sword, no counter there, especially on the switch he gets mirked)
As far as Lucario goes, I just hate his design. Should've kept Mewtwo in... I felt he was more popular. And much cooler design. Idk I just don't like Lucario. I guess it's near that he's an "Aura" pokemon but, tbh, he's kinda boring to me. Looks too human like to be a legit pokemon (ohai that Jynx)
Also while on the subject, I feel Pyroar would be greatly useful if he can get Nasty Plot as an egg move. For now, Sub + 3 attacks seems the most legit way to go.
Also while on the topic, I need a second good rapid spinner not named excadrill Forretress or Tentacruel. Any ideas? Already using Starmie.