That's why it's a great game. A Link to the Past is the greatest game ever made IMO and if you're going to use a game as a model, ALTTP is the perfect choice. Yes Ocarina of Time is overrated IMO, but it is still the best 3d Zelda we have.Yea its kind of a 3D aLttP, but it is awesome.
Also keep in mind that they dumbed down the Water Temple for OOT 3d. There weren't huge lines on the walls telling you where the water is raised and lowered, and I swear dark link is infinitely easier on the 3ds version. On the N64 I've never been able to touch him with the Master Sword but on the 3ds I can kill him without even looking at the screen. Morpha is a joke in either version of the game though as are several of the other bosses. The game really isn't hard by any means anyway. People say that OOT has a moderately good level of challenge for the series, and IMO this is kind of an exaggeration. For the 3d games it's probably right in the middle (Majora's Mask and Skyward Sword being more difficult), but overall for the series it's pretty easy. If you want a game with more challenging puzzles try Oracle of Ages.