I agree much more with the possibility of making a timer be applied to all receivers. I don't deny, watching a recorded program from one receiver, and being able to watch it at another at times could be useful, but it for me would be rare. I say recorded, because if I am watching something live in one room, seems easy enough to wait for a commercial and then watch that program in the other room....OR plan ahead and leave the other receiver on the channel I will be watching when I come in. I actually do this for Around the Horn and PTI. I can only speak for myself of course, but a whole house system is nothing I am waiting for.
And to add to that, I would not want to give up having two receivers that can in total record four Sat channels, PLUS two OTA. Nor would I ever want just a 722 for instance, even if it could do 2nd tuner HD, because if it fails, no TV.
There no reason you would loose any current functionality, or receivers. We are talking about the ability for say, a 722 and 612, or 2 722's, to share recorded material seamlessly. You wouldn't have to give up any receivers. I don't quite understand what you are talking about.
A timer applied to all receivers would just use up 2 or 3 (or however many DVRs you have) times the amount of recording space. This is nothing more than having the ability to share recordings, as we already do between 2 tvs with 722s etc., between all tvs, in HD if wanted.