Quick numbers questions/comments: your LSAC GPA is now a 2.5 or now a 3.3? Also, I’d retake. If you can pull a 170+ (or especially a 173+), you’re looking at an entirely different scenario.
I’m hardly the most knowledgeable source, but I have fairly similar numbers and I was under the impression that even with a 2.x plus high (170ish LSAT), you’ve got a very outside shot at UVA, decent at Northwestern (especially with strong work experience). The most common response to your situation (I’m fairly certain) is to apply EA to UVA, who replies in weeks, and then if rejected, apply binding ED to Northwestern, stressing your work experience. Of course, as you probably already know, the common sentiment is that you should prepare to apply as early as possible to max your chances.
You can’t do that. Northwestern’s ED says that you have not applied ED anywhere else. You can ED to NU first, but with the full ride attached to it it’s not gonna happen with those numbers