First sorry for my english
i have some ideas to improve The modelling in blender
i saw some of them in another programs
so lets begin
* 1- when you select two Edges And chose ( Merge -> At Center )

you will have this Result

But i think the true behavior is to have this result

** 2- when you select one Vertice And trying to unconnect it ( By using V )
you should have Four little Arows Around the selected Vertice

by selectig one of them you can determine which vertice to unconnect ( for the image you select the upper right one )

*** 3- Extrude Along Curve
select A Face Then Ctrl and select a Curve

Press E and chose ( Extrude Along Curve )
select how many steps you want ( For the image 4 Steps )
And ................

**** 4- Inset command is very needed - i know that we can Extrude then Scale but see the images to notice the deference
Extrude + Scale

Inset

notice that all selected edges have the same length
***** 5- Spin ; Spin Dup , Screw ; Warp should move to modifiers panel
And have X Y Z to determine the rotation angle insted of view ports As now
****** 6- integrating Bridge ; shell python scrypts into blender as modifiers
thats what i can think about for now any comments or proposals are welcome
Thanks
