It would be nice to have more resolution in the 'day' drop-down menu in Admin / Reports / Logs. You can pick a log for a particular day or all days, but it would be nice to see:

Last 7 days (last week)
Last 14 days (last two weeks)
Last month
Last two months
Last three months
Last six months
last year

...(for example). There's even the possibility of getting logs between two dates From yyyy/mm/dd to yyyy/mm/dd.