But the TOS crew that is still alive is too old,
That right there is the reason for the TOS reboot. The writing on Voyager, shoddy or otherwise doesn't enter into it.
As for comparing Voyager's writing with Enterprise I can't really say. Once I realized Porthos was my favorite character a few episodes in I gave up on it. As for Voyager, again like any other Trek incarnation some of it was bad but most of it was good.
So that would leave Voyager to make movies from, and I just can't see that happening. Can you? I don't mean, "can you imagine a plot?" I mean, can you see people going to see it?
As long as the title contains "Star Trek" someone is going to see it. Add to that the number of Voyager fans and you could do worse. However, I can't see a movie since the story of returning home is basically done. I can see Voyager characters popping up in future movies though.