My first idea would be YOY (year over year) reporting, and you have two directions you can go with here. After you filter for a set of projects:
1) group by entry date (year) and then entry date again (either "month of year" or "quarter of year"). Select a bar chart and select the lower entry date for your X-axis grouping and then group your columns and select the higher entry date for your "additional" grouping. This gives you a chart where you can compare totals month for month, or quarter for quarter.
OR 2) group by something else (e.g. team) and entry date (year). Select the bar chart and group by team on the x-axis and then group your columns and select the entry date. Now for each team you can see what they did last year vs this year.
My other idea would be to ask if you've looked at the usage dashboard provided by workfront for any ideas -- or to just steal some of their reports outright. https://one.workfront.com/s/article/Workfront-Usage-Dashboard