did we actually see the eclipse from everywhere in the world or just various locations along a similar longitude? (I can't remember)

I'm actually not put off by the Elle thing at all... I see her more as the borderline personality character that has a screwed up sense of self identity from her messed up upbringing and doesn't know what she really wants, so keeps switching between good/bad/happy/angry/scared etc, and they've put her with Sylar and his own good/bad conflict and so now as a pair they keep switching back and forth.

As for the future-with-powers, I was thinking perhaps it is just during the eclipse that they have no powers. Or maybe it's between eclipses- the first one turned their powers 'on', this one 'off', the next one 'on' and so forth, and from wikipedia on solar eclipses "At least two and up to five solar eclipses occur each year on Earth, with between zero and two of them being total eclipses.".