Ok, I frequent these forums to read other people's theories, not to contribute my own.
I don't mean to insult her but I do not see any point to discussing a theory with HeartSeams. I've been frequenting the forums for a long time, and I've noticed that HeartSeams theories are cannon. Anything contrary to her beliefs is completely and utterly wrong. Only what HeartSeams believes can possibly be true, and I'm not sure that even if Nomura himself said something contrary to what she believes that she would admit to being wrong. Arrogance is ignorance. And based upon almost every post I've read of hers, if it's not what she believes it is stupid. She is definately VERY knowledgable, but very arrogant. There is NO point discussing things with her. She is likely to say I'm an idiot because of this, because again everything she thinks is fact. I honestly think it's detrimental to the development of theories. On the plus side, if one's theory is bunk she is going to point it out. But there is no reason to discuss anything with her for more than 1 or 2 posts. Any attempt at a counter arguement is futile.
In my opinion the only way it makes sense to me for Xemnas to have the ability to use the keyblade and choose not to is that Xemnas to have inherited both MX's and Terra's minds. MX is obviously stronger than Terra, and a lot of Xemnas's actions are along the lines of something MX might do. But if Xemnas has both Terra's and MX's mind, the Terra part might be the reason for the lack of use. That aspect of Xemnas's mind won't allow the use of the keyblade even though the ability is there. I have no evidence to support this, but it's the only sense I can try to make of it. If Xemnas indeed chooses not to use the keyblade but has the power, hopefully it (and all the loose ends of the series so far) will be tied up before the conclusion of the Xehanort saga.
Again, I realize that there is no evidence to back up this idea. It is merely a thought, and not be viewed as an actual fleshed out theory. I thought some of you may find this interesting.
And HeartSeams, I enjoy your theories. I don't mean you any disrespect, you are very knowledgable about the series, but please humble yourself a bit. You aren't the only person who has a brain. Other people know about the series and have brains as well. Don't just refute someone's ideas just because they aren't your own. I do respect your theories and your immense knowledge of the series, but your arrogance is annoying.
And with that I bid you guys adieu. I'm going to back to lurking and enjoying reading the many theories you guys have. I just finally got fed up with HeartSeams arrogance, and assumed godlike perfection of her theories. I couldn't just be silent about it anymore.