mount is displayid:
i.e find the mount you want on wowhead:
Ashes of Al'ar - Item - World of Warcraft
open up the pages html source (chrome: right click -> view source).
search(default: CTRL+F) for 'displayid'.
you will find something like this:
where 'displayId: 17890' is the number you need for morphing to Ashes of Al'ar.
let me know how it goes, 115 did include a fix for the zeppelin load screens and *should* fix bg load screens as well.
no ETA at this point sorry![]()