I like your story. It further proves how tragic the life of the Sorceress is. Protecting Castle Grayskull to save the UNIVERSE, giving everything of herself...including giving up her only daughter, unable to even tell her who she really is until the time is right!
As for your questions:
1. Very good point, and I don't think it's one that will get answered. Because, this is an exact clone...with a stone in the middle having the same powers and thensome = more powerful = more dangerous, no?
2. I can't remember if this was in a bio or something we were just told by TG or in a Q&A answer, but the stone was required to "stabalize" the sword after it was cloned (so they can't keep cloning the sword. lol). Everyone thinks the stone is from He-Ro's staff, but TG said no. He could just be trying to keep it secret.
3. Filmation wanted her to be as powerful as He-Man, but also gave her more "feminine" powers. Women are usually more in touch with themselves and those around them, so she can talk to the animals, etc. He-Man can "feel" that animals and creatures want to help. So, he MAY have the same powers but because he's not as in-touch/sensitive. He needs training.
4. Filmation, again. It's in the PoP documentaries on the DVDs. I haven't watched the docs since I first got them, but if I recall correctly, she was going to say the same thing but the changed it to honour at the 11th hour. They thought it was more graceful or something, PLUS she is fighting to redeem herself after years of aiding the evil which overtook her world. So, she's protecting her honour. Something about her protecting the honour of ALL women too.