4 years?
You kidding? There's no 4 years between Buu Saga and DBS, it was said in first episode lol. There's only few month.
Well, most of your takes was destroyed by anime, lol.
And official ≠ canon. For Akira DBS is firstly anime started from 2013, not 2015 DBS or Toyotaro's manga. And considering that Toyotaro's manga is dead in the media, and its content is not used in any products except for this manga itself, then for large companies that currently own all the rights to the franchise, this manga basically does not exist. And Akira has never declared its canonicity. There are only Toyotaro's words that he wants to end the original story, blah-blah-blah, but ... any other spin-off or any other continuation of the story can do this. Even fan fiction can do this(Toyotaro actually doing this rn). The fact that his manga is sold does not make this manga canon for original story by definition. Just as Toyotaro's words do not make it canon. And from Akira's words it follows that DBS as a whole, as a phenomenon, is not a full-fledged continuation of the original story, but rather acts on the same level as DBGT. Just like other timeline.
I understand that losing DBS can be painful, but there is no point in defending it so recklessly either. Daima can't exist within the DBS for many reasons already at the time of the trailers' release, and what will happen when the anime itself comes out? Oh, there will be more. Much more.