Lucee 8.0.0.186 (RC) breaking changes?

I normally am pretty confident to try RC version of Lucee in staging, but since this one is changing the way the config works i just don’t want to rollback too deep in case there’s too many things to debug/modify at once. Is there any major breaking change around the CFConfig.json that i should be aware of ?

Any doc or changelog of v8 somewhere ? I’ve searched for a while but don’t find anything.