No matter what happens, there is just something in this reasoning that makes me irrationally angry. Okay, I agree there is poetic beauty and nobility in self-sacrifice for the greater good, but I can only stomach it when one does it on their own volition without prodding. I just can't see convincing a sentient, sapient being to kill itself for whatever reason as anything but plain old murder. I just can't put myself in a mindset where anyone could vindicate the right to tell anyone whether they should live or die. Send the sphere data to the future? I have no problems with that and that's a very poetic and noble sacrifice on its part. But outright telling it to kill itself for the greater good? That's a huge no for me. Possibly the hugest I can imagine.
You're assuming that the sphere data is not only alive but a sapient being. I don't think I would go that far.
Plus the sphere data wouldn't survive it's merging with Control. It would become a monster guilty of multiple holocausts. A thing that would be to Hitler what Superman is to an ordinary man.