Perhaps, when hovering over a thread lane, the first two pieces of information should be the thread name and the lane name?

E.g.
ExecutorThread-4 / Java Latencies Lane

Also, perhaps, when there is enough space, a clean and reasonably good way can be found to render the lane name in the thread label area? (The risk is that it clutters everything up, so care must be taken.)

A screenshot of the current look is attached.