Imagine the six primary views in perspective (not parallel projection):
Front - Back
Left - Right
Top - Bottom
Click on the front view button and it gets selected.
Press and hold the control key and then click on the left view button and now you get the front left view.
Press and hold the control key and then click on the right view button and now you get the front right view.
Press and hold the control key and then click on the top view button and now you get the front right top view.
Press and hold the control key and click on the right view button and now you get the front top view.
Press and hold the control key and click on the front view button and now you get the top view.
At any time if you don't press the control key and click on a view then that single view gets selected.
It's that simple.
Whenever you select a view button it gets highlighted much like the way style buttons are highlighted in the toolbar.
For each view you can zoom in and out in that axes as usual.
So now we get 6 one point perspective views, 12 two point perspective views, and 8 three point perspective views for a total of 26 perfectly aligned views where the selection of each view is a snap and there is no loss in screen space on the toolbar (with the exception of adding the bottom view button - something that should be there in the first place). Of course for rapid deployment the standard isometric view can still remain.
I honestly cannot see anything wrong with this idea.
What do you folks think?
Of course it is not an entirely original idea. Autodesk 3dsmax has the feature but its done using a cube at the top right corner of the screen where you can click on a surface, edge, or corner to get the according view. My proposed approach befits the feel of sketchup more than changing the views into a cube. I also personally am not too fond of the cube since you have to rotate it 180 degrees if you want to select the back view - which is too slow.