[salawat]

I agree, but herein lay the rub.

For every exception, you need someone on top of it. You have a limited pool of people to distribute this knowledge to, and the responsibility for maintaining this knowledge to even if that just invoves knowing where to look to figure something out.

Overrides are tricky to accomodate, standardize, and organize if you don't nail dpwn the appropriate data model for the process.