I even made a Thank You thread for not including GT stuff. I cannot stand it, not only is it not Canon as they have said, but nothing in GT was even remotely cool. Vegeta with a Mustache was the BEST part, but that wasn't cool, that was FUNNY. SSJ4 looked lame and the whole plot beyond getting it was lame.
Remember when Goku first went SSJ3, and how "Holy ****." that scene was, despite being an average episode up til then? I saw the Episode where Goku went SSJ4 and it wasn't even half as epic.
Though to be truthful, Legend has it DBZ was supposed to end at the Frieza Saga, but due to fan demand and pressure from the company, Akira made all the rest.(Cell, Buu, ect.)
Regardless, even if they weren't in his original vision, he still made them, and it fits. It's the same reason why the movie chars aren't going to be in ESF, not made by Akira and it shows. I mean hell, I'd LOVE Broly, because he was my favorite of all the movies, but it's just not going to happen.(Without model replacements.)
Main thing is, it seems the ESF team wants to stick to the Canon series mostly. They added most of the most important characters, so yeah. Save Kid Trunks & Kid Goten, but we have Gohan & Krillin already, do we need more Midgets?