Indeed, handing Rose a mini!Doctor (or whatever) nicely undermines whatever work she might have been doing in that parallel 'verse (in, as you say, that 'as there's no Doctor, it's going to be me' sort of way).
"Good job, Rose, in helping save the universes but, gosh, you'd do a MUCH better job if you had a faux-Doctor with you (because you're, y'know, *just* a companion and a girly one at that and everyone knows that widdle girls can't do things on their own)..." and, okay, I'm *really* exagerrating there, to make the point. But you know what I mean, right?
Leaving Rose on her own in the parallel 'verse, knowing that she would continue fighting the good fight as needed would have left me with a much better opinion of matters - and of Rose.
But, hey, kudos to her for breaching the universal-barrier because she was trying to save countless worlds, not because she wanted to be with her One Twue Wuv again - although it can't be denied that being with him probably helped motivate things just a tad. Imagine what it would have been like had she gone to all that effort - and found out that he had (properly) regenerated in the meantime. "Oh. You've... um... Never mind."
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"Good job, Rose, in helping save the universes but, gosh, you'd do a MUCH better job if you had a faux-Doctor with you (because you're, y'know, *just* a companion and a girly one at that and everyone knows that widdle girls can't do things on their own)..." and, okay, I'm *really* exagerrating there, to make the point. But you know what I mean, right?
Leaving Rose on her own in the parallel 'verse, knowing that she would continue fighting the good fight as needed would have left me with a much better opinion of matters - and of Rose.
But, hey, kudos to her for breaching the universal-barrier because she was trying to save countless worlds, not because she wanted to be with her One Twue Wuv again - although it can't be denied that being with him probably helped motivate things just a tad. Imagine what it would have been like had she gone to all that effort - and found out that he had (properly) regenerated in the meantime. "Oh. You've... um... Never mind."