I doubt this actually matters, but it looks like almost all those patents expire very soon.

US7418504B2 - 2021-08-05

US6839759B2 - 2019-10-29 (expired)

US7490151B2 - 2022-01-24

I'm guessing rearchitecting to circumvent the patents means they're not going to unrearchitect just to open it up. If I'm understanding things correctly, instead of p2p it gets tunneled through a server to avoid the patents. Since FaceTime launched, most services realized with more than 2 people you'd want to go through a server anyway (and you also get benefits of re-encoding for lower bit-rates). If you rely on Apple's servers to tunnel your call I imagine they're not going to open it up.