So yeah, even with a nerfed Sora, it was still complete overkill.  They overlooked a number of things on Sora's side, and like hell the drives require additional help, the cutscene getting the power shows it's not, that's just a gameplay mechanic.  But regardless, there were too many things on Sora's side, within and without the analysis.  Just be a poor decision to have him lose with a new game coming out soon, they say so themselves in one of the Death Battle Casts for Naruto and Ichigo about how they don't have someone enter with new possible contradictory material unless they were already guaranteed the win just by previous data beforehand.

I can't say I'm a fan of the actual animation, but I can't place why.  I guess how they kept just having Pit using the same attacks resulting in similar animations of Sora bouncing around, I dunno.  That or the lack of Reflect at all.

I mean, what IS Pit gonna do against Stop?  It's not a projectile to be returned to sender, it's instantanious, it can be stacked, and Sora can damage him doing acumulating damage until the spell ends at his discression when he stops casting it.  Because they took into account his magic recarges, if not unlimited.