Classification in 10.2M030 upgraded from 10.1M040 - Is there a way to delete attributes from parent node which were not used in child nodes before Upgrade?

Upgrading from 10.1M040 to 10.2M030

Before Upgrade - Parent classification node has 3 attributes (a,b,c) and child node has 2 attributes (a,b)

After Upgrade - Both Parent and child classification node has all 3 attributes because in 10.2, attributes from Parent node is inherited by child node.

We are looking for 1) a data analysis tool which can identify such cases in the source (10.1M040) system and 2) a data cleanup tool to fix it at source or target.

Has anyone come across this scenario? We have nearly 1000 nodes which are affected (result of a messy CPJ created by resources who had no idea what they were doing....)