It's a big issue to me as a Metal Gear and Smash fan but to the rest of the world it's a single character in a fighting game with a huge roster. It's frustrating but not surprising that no one has really bothered asking.
It's even less surprising when you realize that interviews with Sakurai are pretty rare (especially since the game has been out for almost two years). If we were going to hear about character cuts it probably would've been in his famitsu column, but I guess that's just a part of the process he usually doesn't like talking about. Maybe if Smash NX is real someone will get a chance to ask him.
Sakurai is really weird because when a character gets cut, he flat-out stops acknowledging them. He's said that cuts really pain him, so it's almost like he doesn't even want to think about it. I actually think his explanation of why the Ice Climbers didn't make SSB4 is the only time he specifically acknowledged a character being cut and why.