It wouldn't be Cloud in his KH1 attire without the bandaged Buster Sword, though. Plus, it wouldn't make sense to see Cloud with the Metal Chocobo Keyblade since he isn't a Keyblade Wielder and the KH franchise has yet to introduce a Final Fantasy Keyblade Wielder like Mickey being the only Disney Character be a Keyblade Wielder(not counting Yen Sid at the moment since we have yet to see him wield a Keyblade).
Still surprised that they decided to give Cloud his KH attire given how complicated it would've been using Vincent's cape and golden glove(I can't spell the other name of the thing, sorry). And really, I thought the Metal Chocobo Keyblade looked dodgy. I preferred the Fenrir Keyblade from KH2. Still glad and relieved that they pulled through. Guess this is their way of making up for the lack of Final Fantasy characters in KH3.