>>44774257I don't know, the mud/deep snow routes were pretty tedious in my opinion and a few of the Water routes were also badly down (though not to the degree that Hoenn was at). It's not all of them, but those routes are fucking obnoxious to go through even with repels, especially the snow route.
Most of the routes are kinda boring due to being so short with nothing substantial to explore with them, but they're not awful per se, just kinda "meh". But the snow routes especially are awful. Everything else in the game is great, but the region's design itself is probably the biggest flaw it has to me and why, even though I have fond memories of Sinnoh, it's not my favorite region.