Now in ST TMP we saw an accidental wormhole. Here was a thought. Maybe at the time of Valiant's loss no one really knew what kind of FTL to expect. There is space being warped--but how exactly. A warp ship surfs a true wormhole near instantly connects and a jump drive displaces similarly.
Now perhaps, as we saw from the Varduaar from Voyager, you can get the answer maybe a little too soon. Valiant might have been what the first Star Wars hyperspace ship looked like, and a possiblity missed.
Then we get bogged down in warp factors and all the technological spin-offs that result from more straightforward field manip'