Could you add a config option where it would show the full namespace of what we are looking at?

Could also be a keybind toggle, where it would show: alexsmobs:elephant
or
create:brass_block

Also, for the
#If enabled, block image and name will be displayed
"Display blocks" = true

Could you make a keybind that toggles this in game?

What's the justification for these features? I also refrain from adding keybinds unless there is a good reason to do so.

People have been reporting conflicts with the mod and controllable (playing with controllers).
This would allow them to rebind thing if you add keybinds for the spyglass use.

Furthermore, the idea of having the namespace is for a player to be able to know what he/she is looking at is from which mod, it would make things easier.