It would be great if we could plug a custom normalization regular expression or similar into the tool. We have a series of queries that are similar except for the number of arguments in an IN clause. These currently get normalized into different queries, so we don't get a clear picture of the relative weight of that group of queries to the others that we are executing.
Good suggestion! We're planning to add a filter / rewrite mechanism so you can change the query content before it is stored in the statistics. Hopefully, you will be able to do just that. No date has been set yet.