It'd be great to be able to colour the words in a wordcloud by another KPI.
For example, it's fine being able to see that something is the most commonly mentioned word, but if it's always the most common word, it'd be even better to see that it's green - meaning it has been mentioned more times than a previous month. It could highlight in blue if it had never been in the top X mentions before. Alternatively, you could colour it by another dimension (red for common in USA, blue for Europe, etc).