That would be my intention, just remapping my alt-tab to my key bindings. Only changing how I engage with my local key-binds of my software, no application will set this up for me, all locally.
I really hope somebody from blizzard can advise if this is perfectly okay and I can set my PC up accordingly.
( I just round robin my keys for my casters and warrior stays 1-7, R T F G Z X C V B Q all become the same as alt-tab ), game still reads them as so, my PC then flips through the application on press. All my individual keys will be pressed via mouse through just mousing over.