There is still the private key export function in the menu of the keys view. Thus exported keys are not encrypted. There is also the reverse function, key import, activated by the new key icon.
if you like to view the private key directly (without the 2-factor pdf) one of the best ways to secure the key is to take a photo with a old-fashioned (digital) camera and print it.
if you like analog, you need to develop it yourself though
I wonder if you could get light sensitive paper and lay the phone upside-down on top of it for a few minutes
I have printed the backup directly from the phone before.