I'll agree that Wind Waker is kinda one of the easiest of the Zelda games.
The only thing that was made easier in the HD remake was time reduction in a lot of things (animations and the Triforce quest). The 3 Heart Hero Mode Challenge is still a lot harder than the original ever had.
This is probably the most changes to any HD remaster ever released (minus maybe Halo: CE 10th), as most are just a up-res of textures with very little other changed.