In SC2, you can actually choose your Hotkeys completely free, or choose some predefined version, like the "Grid", which also equalizes every Race, which i think is a very important feature.
No, at least not with that reasoning. These are two different games, and DC is free to do things its own way. You can remap your key bindings as you wish from the options and that should be sufficient.
Of course they should do things their way. But that doesn't mean they can't take a look at a well working System from another game and implement it in order to make their game better.
For some it might not be an important issue but i play a lot with Hotkeys and their current System is not very appealing to me.
I can set up macron on middle mouse button, and the Home key queue a dozen zerglings
I don't like to use makros, as i feel they give you an unfair advantage over the other players.