Some of the ideas fielded were quite good, and I personally think to this day that a Andromeda-style Star Trek could work (minus the black hole time travel).
Not sure what your objection to that was. It wasn't time travel, just time dilation, which is a real thing that would happen near a black hole. They did have to greatly exaggerate the extent of the time dilation in Andromeda
, rationalizing it as some freak interaction of the ship's artificial gravity field with the black hole's gravity well. But it's still more plausible than most time travel in Trek.