Hey my ears were burning
Or should I say my eyes! Yes, I remember hearing in the beginning of the cycle that though Northwestern takes higher LSAT, they love GPA and I was wary of that.
Lucky for me they are looking for higher LSAT's near the end of this cycle. I didn't get in right away (waitlisted) but much persistence seemed to have helped. I applied to a bunch of schools and though I got a lot of criticism for doing so, it was all worth it because I got into NU.
Splits like us are hard to predict. Certain schools you are a shoe-in and some you get an auto-reject. And when it comes to waitlists, it is all about whether the school needs high gpa's (you're outta luck!) or high lsat's (tell them you'll definitely go if it's true!).
One piece of advice is maybe re-take the LSAT a third time since you are doing so high anyway, and there is an extremely low chance you'll get a 154 or lower again without knowing it (cancel if when you retake it you feel like you did horribly). Prove to the schools that the 154 was not a reflection of your ability whatsoever and also offer them a higher average for their statistics. A 162 average is tough for Northwestern even though they do look at higher LSAT.
One thing I learned from this cycle is that if you can afford it, blanket all the schools you are even remotely willing to go to even if they are a super reach. You never know who will bite. It may piss some people off because some think it is a waste of money, but it is SO much easier to get into a top school now rather than fighting off others to get into it later. Your LSAT (as unfair as it seems) is your advantage over others so use it for all its worth because it won't count very much later on.