Hi SESI.
I have found that having the wheel button, the button in the parameters pane that give you access to defaults, presets, edit parameter interface, etc. In the viewer pane too will be really useful when modelling.
For example the transform SOP have several presets really useful to place the pivot in the centroid, and I have added more useful presets, but I always have to go to a parameters pane to activate this presets.
It will be useful to have a button, in the viewer pane too, that opens a popup menu with the toolbox partameters, those who first appears when you press p in the viewer pane, when you press something or release a slider in this popup window it disappears, this allows to have like a volatile parameters tool window.
Thanks