It only takes me one trip through Le Wow due to EV training giving me nearly half of the levels and me preventing evolutions till the final battle (second last battle if it has 2 evolution stages).
We just need to get access to ANYONE with a Starf and a Lansat berry and leveling up will become a joke.
I guess I should stop showing off my Aegislash then. =/
Why? Because shinies are more common but still less common than normal Pokemon? Shiny Aegislash is cool and if you like it, use it. Don't give a shit about how some people view it.
You wanted it, you got it, and you wanted to use it.
Don't let some petty thing as "de-valuing" of shinies make you not use it. Shinies are not less valuable than they were last gen or the gen before.