I would have loved to see the T-1000 in some capacity in T-3, it was anoying as hell that he was not in it, even though I knew from the begining he would not.
The T-1000, aside from the T-x's partical cannon, was better in alomst every way.
Faster, stronger, more resiliant to damage, nanotechnology holds his body together and thus, after long peroids of time he can regenerate. He's smarter aswell. The T-X only less phased by gunfire, which in the end proved little. The T-1000 was just better. And as for 'She's a hot woman, she's better at infultration!' No, the T-1000 could kill a attractive woman and take her FORM!
well, there's my rant... lol