We can eliminate a costly join we do sometimes just by storing report statuses in the reports table and getting rid of report_statuses. Here's an example query that's slow, made by the reports page in PE: https://gist.github.com/wkalt/93f787744df2a527db9488254ba86bb5
unfortunately moving the column to reports will may require a table rewrite due to the expense of an update, but we can experiment.