ok so after reading it 50 thousand times, ive come to a conclusion

they refer to the gobbue mount as content being removed
but only to the achievemnts for everything else

therefore...the content is staying, the achievemnts are going.

my thoughts conclude that they will probly be introducing new achievemnts for all the fights/dungeons
this will be to reflect having done it pre 2.0 versus post 2.0, due to the battle mechanic changes that will be taking place, which could make all content very different in just that regard