>>47777413No. The entire theme of Hoenn is the balance of nature. So having it 50% land and 50% water makes total sense. The problem comes from the fact they didn't take into account the water routes had the same encounter rates as the caves and didn't distribute the Pokemon good enough to justify the larger areas having so few varied Pokemon despite the large area.
Funny enough this could easily be fixed today thanks to the newer games using overworld encounters. Combine that with more varied Pokemon and the water routes are no longer tedious but instead fun optional areas for exploration.