It was a good idea, but we did not execute it right: we saw users struggle with "going back” to larger timeframes, and feeling stuck. Internally, we “affectionately” called this user-experience issue "lost in time."
We went back to the drawing board, and think we found a nice solution: Now, the lists of spans and logs in the Logging and Tracing views filter themselves as soon as a selection is made. You can drill down in a subset of the raw telemetry, without losing the global context. No additional clicks, no "lost in time". Yet, you still have the option to zoom if you want to!