[aeriolewinters]

The issue that first pops up when I think of time traveling theories is that the act of traveling back and interacting (eg attacking Kyubey, warning Madoka) will make things different than how they originally were, opening the way for people to speculate on what kind of world Madoka first started on and what happened there. When you talk about multiple jumps, however, it feels like it is less of her wish but more of her magic. And even if she spent many years going back and becoming more hardened, she already spent more of those years going forward, unless it takes longer to charge for a jump than the time you can travel back. If she still had this power, why wouldn't she just find some place to recharge then go further back again after failing to kill QB in episode one?

Spoiler for You may be right but..:

I think that it is the main essence of the loop, QB wasn't supposed to meet Madoka in the previous world, which I think in the original timeline, Madoka became Mahou Shoujo when the world is about to end; she becomes a mahou shoujo in that world and wishes for time to move back. As she makes this wish QB splits her, Madoka from this timeline and her Mahou Shoujo form, Homura. This current Madoka we see has great potential because she is already a Mahou Shoujo, (in Homura's form) so theoretically, we're looking at a really great potency because of the latent magical power from the other wish she made which created Homura.