When you delete my post, I would like to have a notification of why...

We were playing with new chars from Icecrown in the lower bracket, thanks to frostmourne IC opening (we got 1 thing from IC dung).
Does this new season affect all realms again to play against the highest bracket? And even worse when we got some basic low-level items on other chars and frostmourne does not have access to these low dungs?