And I know I have the intelligence to be at a T15-T25 school, which is where I wanted to be before I started law school.... If I finish my first year, do mediocre on the exams, logically it would make sense to stay for the last two years because the first year is the hardest.
First, I know quite a few highly intelligent people who went to lower-ranked schools. If you're holding yourself above you classmates, it's probably difficult for you to make friends there. These connections are part of what makes LS bearable--and, for many of us, enjoyable.
Secondly, it doesn't make sense "logically" to stay put if you're miserable. I'm a third-year, and it's plenty of work (although you can elect to take it easier if you wish). If you don't like your state school, and don't want to work in that state, it absolutely does NOT make sense to stay. If you're at a lower-ranked school, your degree will still have regional appeal... but it won't be national. You should transfer to a school in the state where you wish to practice, regardless of whether it falls into the arbitrary "T15-25" range.