Cool idea, though I doubt I will try it. Because I don't like the shadow temple much. But I disagree with what was said about the skull puzzle moving. I'm pretty sure that it is in the same place every time. If it does move, it has never been on the opposite side of the room from where you enter the temple when I have played.
I think in regards to the hidden chests, I think they show up on the map if you have the compass so, that is easily fixed, is it not? And I can see being able to do almost everything in the temple without the lens except the moving block. In the main room (the first time there is a wallmaster) the block that moves along the chain, would be really hard. You would have to probably try several times, and once you fall, you would have to start at the top of the room again, and again, and again. I think I would get fed up with that.
But as what has been said. I think fighting Bongo Bongo wouldn't be that bad. If you had the sound on that would help too. The eye always come at you from in between the hands and he makes noise that gets louder as he gets closer, so that might help.