I LOVE the comparison addition. It's a feature I adore in AppOptics and have rarely seen a competitor to. It's painful to recreate something similar in Grafana, even.
While Day and Week Before are the most used options, I'd like to see 2, 3 and 4 Weeks Before as choices, too. Four Weeks being the most beneficial because it's a ~month ago (and is better than "1 month ago" because it ensures we are comparing the same DAY OF WEEK -- that's crucial)