Yes that's fine in a party, but i'm talking specifically in CT or during Fates when mousing over someone not in your party isn't that simple.
If i'm tabbing through enemies with the macro
/ac "Cure" <mo>
/ac "Cure" <tt>
and my mouse is over nothing, after the patch it defaults to healing <me> instead of <tt> because now if <mo> is invalid it goes to <me> instead of the next line of the macro.
Before the patch this macro works as it looks like it should, if no mouse over then <tt>.