Generous of you. And yes, Dark Pit might be very limited compared to say.. Lucina. But the potential of having a moveset is still there believe me.
In the first fight against him, Dark Pit uses a club, the claws, and his infamous Dark Pit Staff. I think those would make for good Special Attacks, or Smash attacks.
He also uses some sort of magical powers that could translate over to Special moves.
Check from 12:55, that's when the battle vs Dark Pit truly begins.
Notice how he does indeed use the very same bow as in Smash, but uses it differently from Pit. He can charge up to rain down a lot of arrows for example, which could be a good new Down or Side Special for example.
11:30 the battle begins here again... Didn't notice that in the last video, Dark Pit was beaten quite damn quickly.
At 11.54 or so he flies towards Pit, that could be a revamped Up B?
12.08, he charges up his Arrow Rain attack, which he could use as well as a new Side or Down Special.
The Neutral B will probably be the same, but can be buffed or become a charge up attack (just to make it a little different)? Dark Pit is more voilent and aggresive than Pit, it would make sense for him to want more power behind his attacks.
It doesn't have to be much... But he could be made into a semi-clone. Him being similar to Pit DOES make sense, and he should keep the same stats as Pit. And in fact, he should remain a character that Pit mains can pick up at any given moment and be effective with.
Uprising really did make me like the character more, but I get why most people didn't like him. Then again, he originated in Brawl sort of. So as a sort of testimony to that, I'd like him to stay.