Improving shortcuts by default + pie menu

This is something I always do when I open Blender on another computer.

Right now, 2.8 is coming soon. An alpha version was already announced today. Though, I still will need to make these changes, which are so useful and better to be more productive in my point of view.

1st:

• Left Mouse Click on the 3D view = Set 3D cursor
• It's better if we use ALT + Left Mouse Click. This way, we can't misclick and move the 3D cursor if we don't wish it.

2nd:

• Tab is for switching from Edit mode to Object mode. Ctrl + Tab is for switching from another mode to another one (or to change for Vertex / Edges / Faces select in edit mode).
• If we install the add-on "pie menu", the pie menu opens from Tab. Why? Isn't Ctrl + tab better for Pie Menu since Tab only is so much used and needed?
• Same thing for switching from wire to solid or rendered. Why the pie menu for this is on "Z"? Alt+Z isn't it better?

1 shortcut, and 2 shortcuts for pie menu could be improved by default.

It's true that when we know how to edit these shortcuts in the input tab of the user preferences, it is not a big deal, but this is really frustrating whatever to know that there is a way to improve this but still to have to edit it when opening Blender from another computer.