I know what you mean in that my investment in Trek is in the 'Prime' timeline. I subsequently have much, much less investment in the alternate timeline (in much the same way that I don't really care what happens in the Mirror Universe, beyond it's application to the Prime timeline).
That said, alternate universe theory is a recognized theory in physics, and Trek has often dabbled its toes in alternate timelines before, so I don't think it lessens the drama of the Prime timeline, and it was a mildly clever, Trekkian way to reboot the franchise, and we'll see where it goes, dramatically.
That said, alternate universe theory is a recognized theory in physics, and Trek has often dabbled its toes in alternate timelines before, so I don't think it lessens the drama of the Prime timeline, and it was a mildly clever, Trekkian way to reboot the franchise, and we'll see where it goes, dramatically.