Things that should be possible, but are not at present:
-Proper imperial dimension formatting. For example: 12'-0 1/2". That is the proper way to write it, NOT 12'-1/2". Trailing zero's was a good step, but it fails if 0 isn't the last character.
-Dimension text masking out the background should be a toggle setting. ON/OFF. I happen to be OK with it but loads of other people want the ability to turn it off - same with text boxes.
-DUAL Dimensions. ISO is irrelevant here. Nothing says you can't surpass the ISO requirements. Dual dimensions should have one dimension above the line and a second dimension below the line and the line should be visible between them. All flavors of AutoCAD, Revit, Solid Works, and Pro/E have this ability. Inventor inexplicably does not.
-If you can hide the extension lines of a dimension, and you can hide the arrowheads of a dimension, you should also be able to hide the dimension line itself. Clearly, with the others being toggle-able, the infrastructure is there...
-Add a radial dimension system. Having to manually write 30 degrees at the end of a radial center line invites mistakes and typos.
If anyone has more, please add them. If i need to add them to the OP I will.