I don’t know where is the better place for write this, and I write hire. Sorry if it is off topic.
I think developers can do it without my help, but I’ll write it anyway
I saw these proposals about Icons.
And I don"t like it, because this icons look very similar to each other, difference between them is very small, about a few pixels. It’s a little hard to recognise.
I propose use 2 “guidelines”
Shapes and formes (roundish, rectangular, squarish, triangular, cross, symbol etc). For example rectangular, it"s not a naked geometrical shape, but rectangular looks like.
Color scheme. for example
green - for creation
yellow - kind of editing
red- for remove
or use other colors
For Delete-menu and Merge-menu Icons also can be used colors for vertex, edges and faces functions.
vertex - blue
edge - yellow
face - purple
When you will look on this menue, you will know about blue scheme - is for vertex, yellow scheme - for edges etc.
And shapes maybe:
circular - for vertex
square - for face
sorry for my terrible English