The board seems to be working perfectly! Building it up took me about 8 hours (I'm still relatively new to SMD work), and other than the few issues mentioned in the prior log, it all worked as expected.

I found that solder paste + hot air isn't as precise as hand-soldering for me, and some of the parts which are close to vias ended up shorting in the process. Hand soldering is more fun anyway :)

The 3D printed box I had made earlier worked out great.