>>46272162LGPE is shit but only because it's just a downgraded FireRed, hell, it's a downgraded RBY, but it's still playable since Kanto is a tried and true region.
Unlike fucking Sun/Moon and Shit/Shat which don't even have a region, just hallways leading to flags, basically not even games.
So I'd take a Let's Go Johto over another generation of Pokemon. Ever.
That said, I wouldn't buy it, never bought anything that came out after SM.