Re: What happened to 'time travel at will'/slingshotting?
I always get the impression when watching 'Assignment Earth' that more episodes with the Enterprise going to different periods of Earth's past might have been made.
I imagine Bateson's ears pricked up when he heard the Enterprise-E had traveled back into the past following the Borg attack. "A way back to my own time? Tell me more!" Remember, the Bozeman was right there at the scene.
Whether Starfleet would let him do it is another question, of course.
No kidding. There really isn't any difference being shot forward in time like Enterprise-C or getting stuck in a time loop and coming out of it in the future. Imagine what TNG could be like if the Bozeman went back to when it left.
Why stop there. What about poor Scotty or Kirk if he had survived.
"It's not that you can see the strings, it's that 40 years later you're still looking at them." - Steven Moffat
"This movie was big. Imagine how big it could have been with me in it?" William Shatner