BIM walls

The sequence to draw walls could be welcome in this way:
1)to set current wall type and height for all further walls at first,
2)start not from a "polysolid" command but from a "Wall", using current wall type and height settings and draw like a polyline with height and width settings,
3)possibility to change a wall/storey height parametrically, in a manner how window's reposition is implemented.

Regards, Vaidas