Open With Dialog - Improve the Use a custom command option

I apologize I do not know what section this should be mentioned in?

Currently if you open up the "Open With" dialog there is an option at the bottom "Use a custom command:"
All the other launcher creators allow user to set icons, name, command itself, etc.
However I noticed that this method only provides one field to do so.
I am aware that this option creates a little different kind of launcher as it only shows up in the "Open With" flyout in context menus, but it still seems limited and seems like it might benefit from receiving some updates.
Currently it does not give that new launcher an icon or a name, it just uses the command as a name, user would have to go and edit the "userapp-.desktop' file it creates.

Suggesting maybe could have it....
-Automatically add icon based on what icon that commaand (applications) uses
-Allow user to choose an icon
-Allow name field
-Command field (which exists currently)

Thank You