Add the ability to use the native equation capability in word. Equation editor 3.0 is not sufficient and does not support tex directives.
The equation editor got a major boost when word used its own native tex-based solution to adding equations. I frequently use equations in my visio diagrams and if I had this functionality it would dramatically improve the product for my use cases. At present it is a strange omission given the feature's presence in powerpoint and word and hopefully it would not be too hard to add.