Ability to see which fields were updated (old/new values).

We would like to have visibility - when accepting and/or approving a record - into which fields (both standard and custom) were changed on the change request. Bonus feature would be to show both the old and new values. 

For example: if email address is changed, the field is highlighted light blue to indicate it was changed. Bonus if it shows the old value crossed out and the new value next to it.