Multiple View Displays
A quad display would be extremely useful! i.e.:
Option to split interface in to 2, 3 or 4 quadrants with the ability to change view separately in each quadrant. For example, wireframe (X axis) in one panel, wireframe (Y axis) in another. Gumball, low res preview in third (for modelling) and render preview in fourth.
Junior Rocha commented
A Secondary View, like Photoshop 3D Workspace.
Is very helpful to positioning objects without change the current view