It would be nice if the Run Job page would show the time remaining for the current tool path as well as the overall remaining time. In fact, having the list of times from the Preview page also shown on the Run Job page would be helpful.
Be aware those times are estimates.
If your path is doing a lot of small cuts the machine can not run at the set speed.
An example is image that have been traced and using a drag bit.
Sometimes the actual times are 2x ( or more ) of the estimate.
If found no CAM software can predict the actual times for that case.
Agreed, they are only estimates and can in fact vary greatly as you pointed out. I still think it would be useful to show the estimates on the Run Job page.