You can avoid the constant use of Ctrl+Shift for sub-object selection by enabling the Selection filter. It’s a bit cumbersome, but at least gives you some alternative. Keep in mind that selecting whole objects while “Sub-objects” is active is done by holding the Ctrl+Shift keys. It’s also accessible through the “Filter” button at the bottom of the screen next to “Record history”.
In my opinion, it would be nice if Rhino by default uses a different approach for the aforementioned button. Currently, no matter of the “Filter” button is active or not, selection filter is always active. This does not make any sense. Deactivated “Filter” should deactivate the selection filter… At least this is my logic.
Also, while “Filter” is inactive, clicking on it opens the “Selection filter” pop-up window, which is another inconvenience. I suggest to open that particular pop-up window by right-clicking (and optionally click on the existing “Show selected filters panel” option), while a LBM click on the inactive “Filter” button should activate the selection filter without showing the pop-up menu.
There must be a tickbox in the “Selection filter” called “Highlight”, so that the user could easily switch between a solid yellow colour (or any custom one) for the selected face(s) or just the outline while the face itself retains the object colour and material.
The following bug also needs to be addressed. First extrusion to the right side is fine, but then the second extrusion to the opposite direction creates an unwanted split edge instead of automatically merging the co-planar faces.
The fastest & most skilled SketchUp/Maya/Rhino/… users can not draw a sketch as fast as using pencil and paper if you understand what I mean.
These are different tools for different purposes. You can not ask for a sniper gun that has the same features as an assault gun, and vice-versa. You can not bring your 3dsmax habit into Revit. And choosing the right tools is very important. Based on your “style” of working, you should choose the right tool. I met a guy who only designs houses in Bauhaus style (aka German boxes) and he uses Maya, he should use SketchUp instead.
So I dont think bringing your habit from SketchUp into Rhino is a good question here. I think SketchUp & Rhino have different target audiences. Rhino doesnt have to copy SketchUp modelling styles. And for the users, “how can I do in A tool in the same way as B tool ?” is not a good mindset.