I'm sure that's not what you want, but personally, I would do a quick remove of all orphans this way :
pacman -Qe | cut -d' ' -f1 | xargs sudo pacman -R

No confirmation, but well that's quicker ;) And you can always reinstall the packages you want after.

Or if you have 100 orphans, and want to remove them all except a few ones :
pacman -Qe | cut -d' ' -f1 | grep -v -E "^pkg1$|^pkg2$|..."

And if you don't like the unix power of combining tools, you can now do :
sudo pacman -Rs $(pacman -Qtdq) :)

Edit (off topic) : the above command could also solve the request made in the comments of  FS#7208 
You can't list recursively orphans with -Q, but -Rs will list them all and ask you to remove them.

There has not been much interest in that feature request, no one commented but me.
And in my opinion we don't need another pacman option when we can combine the existing ones just fine.
So I will close it now, but feel free to re-open if you like.