As I watched the latest trailer, and I'm sure everyone has noticed this by now if not already noted by Nomura,and I finally realized that Sora doesn't have an initial drive launch. There isn't even a gauge for the drives. The gauge is for shotlock commands. Sora's forms are linked to the Keyblade he uses. Kingdom Key has the Second Form transformation. The new Toy Story Keyblade has the Drill Punch transformation and Sora gains a new Form in that mode. Sora's clothing and abilities change based on the Keyblade transformations. This is big in the sense that it shows maturity in combat and better control of forms that he can easily use them within his combos.

Yeah seems like Sora's starting to fight kinda like Terra's Lingering Will in KH2 where he keeps changing the keyblade into different stuff and that drive forms are gonna be tied to those rather than be their own thing

Yeah I was noticing that too, he seems to exclusively have these forms with those particular Keyblades. I mean you don't see him pulling off that yellow Guard Form with the Kingdom Key or "Shooting Star" Keyblades, so that's already a big indicator. And yeah, now that you mention it, there doesn't seem to be any flashy indicator of Sora's form changing, it almost seems seamless compared to the flashy lightshow that KH2's transformations or BBS's command modes and D-Links had. It almost makes me think back to how when the concept of Super Saiyan was first introduced in DBZ it was this big epic flashy prolonged thing that was treated as a big deal, but as time went on and more transformations and higher levels got introduced, less strain and time was spent in the initial Super Saiyan transformation. It basically became a effortless second nature at that point compared to the higher levels, yet it was still pretty impressive and cool. That's the vibe I'm getting here, Sora at this point is much more used to the concept of transformation, even when coupling that with Keybalde transformations, which is another beast altogether. I guess you could say that you're not dealing with the average Keyblade wielder anymore. X)"