Yeah, but TOS+ do things like have the Enterprise to to the edge of the Galaxy and then later have "We won't make it there in time!" stories.
So it's the same problen, inverted.
That's just stupid writing.
Had the writers actually cared, they could have easily made some quick calculations and at the very least make the distances involved consistent with the Warp speed required to traverse it in the designated time-frame.
Using speed of the plot is idiotic at best because you are using one speed that's faster than anything you previously used, and on another, you are so slow to the point where it's taking you 10 seconds to traverse several hundred thousand km's at Warp 4 (when realistically, it would take you a fraction of a milisecond at THAT speed - more or less).