That seems like a security problem
I mean if I have some program which only needs to talk to my server, I can just deliver the correct certificate with it. There is no advantage in relying on some external certificate authority which I do not control.
In fact, since I have no idea what the Google approved CA does and I have to hand over the keys to my kingdom, it's kinda a problem. I trust in yet another external organisation.
Plus the obvious problem is that this might hinder reverse engineering as I cannot bypass TLS by using my own certificates.
