>>38632010Johto had more to work with and cameos from Diamond/Pearl were just good timing. That and the DS cart size is much more generous than a GBC cart, so they could make that the game it was meant to be.
LGPE did enough to engage new players into the world but GameFreak wasn't going to stuff Kanto with new areas and act like the game would sell like hotcakes. They may not always give fans what they want, but they still know what diminishing returns are.
Stop acting like Red/Blue deserved the FFVIIR or BoTW treatment because that's not what the series is.