Final impressions:
1 > 2 = 4 >>>>>>>>>>>>>>>>>>>>>>>>>>> 3
The finales of the last two seasons feature a whole lot of Doctor Magic and meaningless technobabble. Overall, though, I would list this finale as a good set of episodes, which is not a favor I'd pay to the third season. I may rally against fanservice elsewhere, but I dug it in a cheesy way, right down to the ending here. It was really nice, and I think it was decently well done. The second season's finale is also flawed, but not fatally so, so I rank them together. The finale of the first season was at least interesting, even if there was some Doctor Magic involved.
I think this was a decent set of sendoff eps for RTD. He did what he does, he did it well, and he included a lot of things that will keep fans happy or bitching and talking.