I don't know about point one, perhaps it didn't want to exert itself after an experience that was so disruptive to its body, unless absolutely necessary. After all, they weren't going anywhere fast.I've always thought the damage from being frozen was a bit more extensive than the 'extremities mimicing floor' bit....the T-1000's cognitive abilities seem to have taken a hit too. A few examples:
1. Why did the T-1000 walk...slowly...menacingly...towards our heroes (giving them time to get away) after reforming?
2. Why did the T-1000, after handing the T-800 its ass on a plate, IGNORE the weapons the T-800 had? He could've easily terminated John with either.
3. Why did the T-1000, after apprehending/torturing Sarah Connor, LET HER LIVE?! On top of that, why did the T-1000 let her keep the shotgun?
As for points two and three, one can see examples of this way before the steel plant scene. In regards to point 2, you notice that the T-1000 did not knock over a gun store, unlike T-800 of the original. It merely picked up weapons that it came across, mainly pistols. As for point 3, early on, the T-1000 abadoned the T-800 in the mall, a potential threat, that it should have probably finished off. Throughout the movie, it shows a rather monomaniacal pursuit of Connor, sometimes to excess.
Both of these point to the fact that the T-1000 seemed to be designed with an infiltration role in mind, rather than front-line combat unit (at least, this one had the programming of one).
I would like to comment on Omega-13's arguement. Sometimes I find the idea of strict suspension of disbelief (everything on screen is absolute truth) difficult to accept also, and it does sometimes make us take things out of context than the creators desired. For instance, in ST4 by strict suspension of disbelief, the Klingons must have some kind of size-changing technology, since the Bird of Prey changes sizes. In one episode of Babylon 5, the characters decide to use a laser to send a message through the hyperspace gate. The laser looks like a typical Hollywood laser: in glows brightly for the viewers. *We* know a real laser doesn't do that. What do we assume? That the characters are all morons who don't know what they're doing, and that they're in fact using an unidentified mechanism? According to strict suspension of disbelief, we should do that. Then's theres the sound in space, thing. For Star Wars its explained (sortof) but for every other franchise, what do we assume? There are other things, but that's what comes to mind at the moment. I will say that I don't think it applies in this circumstance, nor do I think that his Death Star example makes any sense. However, the arguement itself, in special circumstances, is valid.
As for who would win, I agree with Steven Snyder. With the correct weapons, the correct knowledge, and with a little luck, they could take it down. But if you just replace the T-1000 with the Predator, I say they go down hard.