There should be an operator input for 'step over' to set the width of the cut when using conversational programming .. if it was listed as '% of tool diameter' it should work for both inch & metric users the same ..
I agree with @gmarsh1 that this is an important option for the conversational programming. Just take a look at John Lambert's YouTube Video "Tool Height using a Haimer on the Masso" to see what happens when you program it without a step over.... at the 6:40 mark he talks about this issue and by the end of video his shop looked like a hookah lounge gone out of control!
I personally like the percentages of tool diameter option. That's what I usually use to set the optimal load for profiling and slotting operations on my mill so you would be saving me a step. I also would like to see an option to add a different speed for the plunging operations. If its to complicated to add another variable I would just preset it to at least 1/2 of the feedrate.