Two issues:

1) Has the Autolabel function ever worked for creating Metric features (other than tapped holes) in an Inch file? I do not recall past functionality but in the current version if I create a metric hole using the Tools>Feature function and set the Database to Metric in the Setup tab it will not dimension as a metric hole in any instance that I create, the units are Inch. Changing the Standard before or after the creation has no effect either and there is no way to simply change the Units in Autolabel.

2) Adding to this issue, I seem to recall that I used to be able to Generic Burst an Autolabel in an Instance in Layout Mode and then edit the text. In this current version however there is no way that I see to do this as selecting anything in the Instance with Generic Burst simply selects the entire instance.

I forgot to note in Issue #1 that this DOES work for tapped holes as implied earlier in the post. Creating a Metric tapped hole will dimension as a metric thread including drill diameter and depth in Instance Mode.