I don't mind the Gummiphone in place of Jiminy's Journal. If this is what they use to catalogue the story and treasures etc. Then I can really support them bringing it back. But as a means to communicate through cutscenes and not have Sora go to Radiant Garden/Land of Departure/or whatever? No thanks.
I hated how the Gummiphone was used in KH3 cutscenes for important conversations and just made important plot points such as Ienzo telling Sora about the 3 hearts into a plot dump. Cut that crap out for KH4 please.
Yeah more ingame stuff and reason to travel.