It would be great to have an option to compare stats for services this with last year stats.
Just out of interest, what kind of comparison visuals or tools would you like to have when comparing 2 (or more) services?
I second this suggestion.
We are always looking to compare last year's numbers (for a service in particular, but would also work for a group). It could be as simple as creating a comprehensive report with one report from this past Sunday and one report from the previous year's corresponding Sunday. The only problem with this is you would have to change the date every single week. While that doesn't sound like a lot, multiple reports across multiple campuses can get overwhelming.
I've added a feature request for this.
There's a few ways to do this with some built in reports for some time periods, such as 'This Quarter' and then 'Last year quarter 3' but as you mentioned, this doesn't update automatically with changes of dates.
Hope this helps,