It would be nice to have a clearly viewable area (perhaps in the Transport or Arrange window info strip) or a standalone window (resizeable / configurable) that shows what the current DAW latency is, ASIO latency and the combined total.
Show in both milliseconds and samples.
Both as live input (via ASIO Guard 2) as well as for non live inputs for general mixing.
Also, it would be nice to show which plugin is the current bottleneck (has highest latency).