@rv1974 said
6 clicks is ridiculous
Well, regardless the plugin you chose, you've got 2 step to accomplish, first you need to select something, then you need to perform the action.
Provided that you enable the 2 commands in the right click menu, you need 2 clicks to open that.
You can actually just hover mouse to the "group copies submenu" without clicking on it (so they are potentially 2 click less), then you need a click to select and another additional click to convert.
@rv1974 said
trying to find something in this filthy right click menu
The Selection Toys UI is one of the best in my opinion, being that is TOTALLY customizable with a few clicks.
If you feel there are too many options in the right click menu , you can easily remove them at any time.
@rv1974 said
frequently used tool
It shouldn't be used that often TBH, you are supposed to use components from scratch whenever it's needed.
The tool is intended to fix errors due to lack of attention.
You should always pay attention to what you're doing, to begin with. 
@rv1974 said
They're several dedicated groups to components scripts
Yeah, I know I've one of them and never use it. Selection Toys is more powerful being that it allows to select group copies that are nested into other groups and subgroups (and allow to choose if you want to pick all the copies in the model or only those into the current context).
It also has tons of other useful selection filters (which I use way more than this specific one).
If you know a plugin that requests less than 4 clicks to perform the exact same operation from context menu with the same level of control, let me know, maybe I missed something.
BTW if, for whatever reason, one need to use some specific command that frequently is a matter of second to setup a couple of dedicated toolbars buttons using Lord Of The Toolbars.
That's something I usually do for my most frequently used commands (which I don't use so frequently to deserve a keyboard shortcut, of course).
The attached video shows how fast you can perform the action on nested groups.
EDIT: apparently you deleted the post while I was answering, I'll reply anyway because the video and the advices could be useful for the OP or anyone searching for the same question. 