It make no sense to me whatsoever to say that "time itself" changes. The rate of the clock changes, that's all, and that's been amply demonstrated by the GPS, etc.
Same with "space" shrinking or expanding. It's senseless. We all know that material objects, like yardsticks, can change length with temperature changes, etc. If that happens, the results you get when you "measure" distances will change, but not the distance itself. The same football field can't "really" be 100 yards long, 50 yards long, 10 yards long, 1 inch long, etc., ad infinitum, just depending on who's looking at it and how fast they are going. The football field never changes one iota. "Space" doesn't just selectively change either.