Corticon has a very powerful feature called "Rule Compression" which can reduce the number of rules required by combining rules that have the same outcomes. This often occurs when a more general rule encompasses (or subsumes) a more specific rule. The more specific rule may not be needed.
Unfortunately after compression it can be hard to see which rules were actually merged or which rules subsumed others.
It would be nice if there was a "preview" feature that allowed you to see which rules were going to be combined before actually doing it. Perhaps even allowing the ability to choose which ones to combine and which ones to leave as is. Keeping them separate allows for a different message for each rule.
Maybe some kind of column highlighting similar to the pink columns for ambiguity. Maybe the columns that can be merged could show up in light blue.