No system crashes. FC a couple gaps, some navbar issues. Not, however, unusable.
I tried flashing over my current ROM, flashing at different points during new ROM install, with and with without reboot to recovery at different points during install. With and without custom kernels.
... All to no avail.
So, I entrust my discovery (I hesitate to call it that) to my beloved Dev community.
All credit to those applicable as mentioned in the link provided.