You can get really strong weapons really fast with Fusion, so I was able to take down black enemies with ease two hours after landing on the surface when in BotW, I was avoiding them for days. Other than that, I’d say the games are equal. The new enemies like Gleeok seem hard when you first run into them, but once you find a way that works, every enemy becomes a chump.
Shrines, on the other hand, I thought were harder but not in a good way. Where BotW asked you “Can you solve this puzzle?”, TotK asks you “Can you get this to work?” and it’s just annoying when you know what to do and still need to do it several times until it works.
Judging by what the people in this world are saying, being rolled up into a giant ball and lobbed into space isn’t as bad as it sounds.