Im not sure i like the public internet with ip certs. I do it at home because sometimes dns be down and have some good internal uses. But, shouldnt be public. Imagine firing up a /24 on linode, requesting certs on every ip, then releasing the ips, and saving the certs. Another linode account would later get an ip in that range, and then you can freely mitm the linode site by ip. Im making a number of 'magical' things in between this, of course, but, it seems allowing an IP from a public CA could be a terrible thing. The only saving grace in this case is the short lifetime of the certs, however, im not a fan of that either.
As an aside, im starting to get squinty eyes relating to LE, both things they announce in that article, are things that greatly affect the internet at large. I see it as something google would pull to ensure dominance by lock-in. Sorry you can no longer change SSL providers because certs only live a few minutes now, and of course you cant afford to not have a cert or no one will see your site. Im exaggerating slightly, but these changes are not something i think should be allowed, and LE shouldve listened to everyone yelling. Sure, allow down to 6 day certs, but that will surely become the maximum soon.
That's a bit of a stretch to say anyone agreed on not using IP based certs. Quite the contrary. It is present in RFC 5280 and SAN can contain an IP. It's just very rare to do that, but can be done and is done. Modern browsers and OSs accept it as well.
It's nice when you need to do some cert pinning to make sure there is not MITM eavesdropping, or for example on some onprem environments where you can't fully control workstations/DNS of you user endpoints, but still want to have your services behind certs that actually properly validate.
You don't have enough nodes for CRL size to become a problem, and if a node does get compromised you're hardly going to leave it up and running for a year (i.e. you'd obviously kill the node, and the cert is useless without control of the DNS name).
EDIT: the other direction to go of course is way shorter. Like do you need a certificate with a lifetime longer then business hours before renewal?