I m the maker of PhotoSweep. The cleanup flow is built around one trust boundary: show matches first, keep exact duplicates separate from similar lookalikes, require an explicit confirm, and move only confirmed selections to Trash. This is a small post-launch design note, not a relaunch.
If you use Google Photos in Chrome, the current build is here:
PhotoSweep is a Chrome extension that helps you find duplicate and similar photos/videos in Google Photos™, then review Exact vs Similar groups before anything goes to Trash. Matching runs in your browser; it does not upload your library for analysis. Not affiliated with Google.