They have not changed - you may be thinking about how rotations may differ, but no adjustments were made. 

When I asked support about it wonder why they didn't mention no changes had been made.

On that I can't say. It would just be odd for Plarium to make unannounced changes - especially in legacy content which doesn't really get touched by the devs much if ever in Raid. 

Maybe me but can't recall ever seeing 3 silver coin rewards on 1 floor. Thanks for explaining 

Yeah dont think they've ever changed the rewards.

I have no idea about the intermediate rewards as they are largely irrelevant.  That said, if they did change (regardless if good or bad) there would be numerous complaints by now lol.