The list can be quiet long especially when you approach the 50 monitors. Searching with realtime filtering would make it nicer to use.
For the Report tab I imagine it like replacing the current dropdown menu with an equally styled search box. When you click it the same dropdown menu is shown, but when you type the menu will filter down to only suggest matching items.
Certainly makes sense, I had a chance to experience this by myself. We'll work towards making the Monitors Grouping, Realtime filtering, or Search in the list view and enhancements in the Reports. The next release is planned for Q3 and we'll work towards revamping the UI/UX of Freshping following the release.
I truly appreciate the love you have with our product. Keep sharing your feedback.