Have you tried calibrating the "Scale Factor" for the time estimates? I have found if you keep a log of how long all your toolpaths took to run for a while, you can figure scale factors based on types of toolpaths, that will get you a lot closer to actual cut times. Since each toolpath type has its own differences it is hard to calculate a scale factor that can be used to cover entire jobs that contain 2D/2.5D toolpaths as well as 3d toolpaths.That carve came out nice and clean. 14 hours, wow! How big is it?
Sometimes I run a tool path on a model, and the time tells me 32 hours, I put that one on the back burner. LOL!