1. Did you wipe DATA and CACHE ... need to do both.
2. You can try a different kernel as well from his custom kernels.
3. You could restore from your backup then download and install his bkapps and rstapps scripts, backup your user apps from your current ROM, then restore them. I have only done this from one Chevy Rom to another one, but it should work from other ROMs too (I think).
I updated from a BB Android2.1 ROM (don't remember the exact BB version) to SS4.1, then later from SS4.1 to SS4.3 with no real issues.