During season 3(second season of actual rank) they made the announcement about this. I have both first and second ranked diamond trails. Not easy I am not sure how you came by that it was.
there was no master it was diamond predator, platinum was a bit&& and the scoring system was different.
To prove my point go back to season 3 and look up ban hammer applied to rank players. People weee f4, or console equivalent to not lose ranked points. Those who were caught doing it did not get the dive trails.
As far as the temporary ones, it was announced and has been this way since then. I think you should get to keep them always have. But I also played when that was the case and earned mine in game as well.
Taking something away from someone who earned it through the system that was in place seems kind of wrong. You and others obviously have the same thought and if it comes to pass then so be it. To me it just signifies in season 2 and 3 I committed to playing the game and was rewarded for it. Not like I can’t live without them.