As it was already brought to your attention, the "Andelph Drakora" collection mount lack a little something to make it special on its own, especially so in this server where custom mounts are kings!
During 5.0 pre-patch,
Sjinderson answered that the proposed changes (stealth, dash invul.) would make it too powerful and versatile, probably rightfully so.
My take on this would be the following: make it special for one given aspect, it's speed! His base speed already give an hint, just adjust it to make it relevant against what ArcheRage already have to offer. Let the trademark stealth/dash to the Ign/Moon/Iceneer, the leap to the Stormwraith Kirin etc.
#The proposed change would simply be to either
allow him to wear armor to increase its base speed as other mount or
adjust his base speed to make it as it was wearing one (which would be equivalent to a 30% boost)
We don't need another "jack of all trades", we just need to make it appealing and specialized! It would serve the amount of mount/time/gold required to complete that collection
Thanks in advance for your consideration!