I absolutely agree with you. I was thinking the other day that you can use the same strategy for almost every Zelda game and while I love the series it makes buying the game almost not worth it because you can complete the game so quickly. I crave a boss that is so hard to beat because they are constantly changing their appearance and status that I have to turn off my console at least once out of frustration. Those are the battles that make you feel awesome about yourself when you finally beat them.
I support the theory of the multi-Link. Each game is on its own timeline and while there is the same Link for linked games like MM/OoT, OoS/OoA, WW/PH/ST each story has its own hero of whatever. I have also heard several theories in regards that the hero of whatever is the descendant of the previous hero. I think that that theory is completely ridiculous. Is it coincidence that the hero in each game has blonde hair, pointy ears, and wears a green tunic with a floppy hat? Or is it the will of the goddesses that the hero look the same so that the bearer of the crest of Wisdom can recognize him?