Well, I can't help you with all of them, but I can with some.
1: The Elite sabers are generally a bit bigger than something like say a Consular, and most sabers are good for both hands anyhow. You're probably okay.
2: From looking at it, it looks good for dueling, with no glaring boxes or anything. Most of SF's sabers are pretty weighty.
3: From what I've observed, yes. It creates that difference between a saber and a glorified flashlight.
4: Presumably any form.
5: A V4 blade and blade plug both come with.
6: All up to personal preference.
7: If this does happen, you can take something small and wedge it between the battery and the pommel. This may be caused by the extra space made with Warrior tiers that don't have a soundboard taking up that space.