To play devil's advocate:
A lot of the areas he was "buffed' are less relevant in Smash 4. For example, Force Palm's grab can't be chained anymore. A lot of his attacks are increasingly narrow. Stronger aura? Well, while only Lucario gets boosted damage, everyone gets boosted launch power, now. Aerials, while buffed in impact, their reach is still a bit short.
But again, we're too early in the game to know. Indeed, the people who are the most eager to play Lucario are often trying to play him like they did before. It is 100% possible he can be a high tier character after we figure him out again. It has not even been a month now. A year down the road, it's possible that the characters we think are the best will just be getting shamed.
I will at least agree that Extreme Speed and his throws are great, though, and Aura Sphere charges MAD fast for how powerful it can get due to Aura mechanics. So, in that sense, we're off to a good start.