I dropped out of law school a few years ago (lower ranked T1) and I did exactly what you are contemplating (I dropped out of law school towards the end of my first year, right before finals). I haven't even been on this forum since 2011, but once I saw this post, I felt I had to say something.
Like you, I had the realization of "wanting to quit" about halfway through the second semester. In hindsight, I should have quit as soon as that realization occurred, but oh well. As you said, hindsight is 20/20. Whether or not you take your finals seems a bit irrelevant; it sounds like law is not of great interest to you, so there is no point pursuing it further when considering the expense and poor job prospects (unless you have a killer class rank now...in which case I would say go for it). Of course, as previously mentioned, there might be a good strategy in taking finals just to continue the loans if you will need to support yourself...but in either case, I don't think you should finish law school.
Also, like you (our stories are eerily similar), I graduated from a solid undergrad with a business degree. However, once I quit law school, I found that the job search was extremely difficult. I think this was largely due to the fact that I was basically "starting from scratch." I did not have true access to a career center, on campus recruiting, etc.
As a result, I went back to school (yup, more debt) in something with more solid job prospects. I am currently pursuing my post-bac in Petroleum Engineering at a state school, and I have to say it's one of the best decisions I have ever made. I've had 3 internships (including major E&P and service companies) not including the one lined up for this summer, and they have all paid at least $30/hr. I know, that's not as much as being a summer associate somewhere, but there was no way in hell I was going to get that with my law grades.
I will have close to 80,000 in debt when I graduate school, but I will have a job that pays 80,000 annually (the company I am working for this summer said they will hire me upon graduation). Not exactly a "lavish lifestyle, but it's not terrible by any means.
So, here is my advice. Quit law school, and get a post-bac in Mechanical Engineering or Chemical Engineering (maybe not Petroleum Engineering, due to the current state of the oil and gas job market). You may not be passionate about it, but dude, that's totally ok. Many successful people got their first jobs not because they were passionate, but because they needed money. No shame in that game.
The engineering curriculum is challenging, but it's so much easier to face that successfully when you know you'll have better job options. Graduating from undergrad with a technical major and a good GPA will provide you with multiple career opportunities, whether that is consulting, finance, or even oil and gas (if/when the market turns around). It will also provide you with more debt...but in my humble opinion, that's worth it.
I know this is very specific advice, but I truly believe it is a great path for someone who is not quite sure where they want to go in life (as I was).