Sinnoh had a lot of problem. the gameplay was slower, the progression system was slow and unbalanced, and the pokemon were a bit lack-luster. thats why it SHOULD be remade. with modern hardware and mechanics we could get a definitive Sinnoh game.
meanwhile we have the Kanto region. the most overused region EVER.
Gen I - main game based in Kanto
Gen II - entire Kanto region was updated and playable in Gold, Silver, and Crystal
Gen III - Kanto region entirely remade in Fire Red & Leaf Green
Gen IV - updated and remade in Heart Gold and Soul Silver
Gen V - first generation in FIFTEEN years to not feature the Kanto region at all
Gen VI - Kanto starters are made available in addition to new starters
Gen VII - the Kanto region is referenced every 10 minutes and the original games are now on VC.
yeah, im too nostalgic about Gen I. in fact, I feel like it holds the series back. Gen V was the best generation they ever made, and it the first and only time nothing from Kanto was used. we cant just keep reusing it over and over and over again.
I can agree with this.