Currently, in Retail WoW, the story of the Draenei is of a people, that had to flee their home planets twice. Sargeras, Lord of the Burning Legion, offered the leaders of the Eredar on Argus, as they were called back then, immense powers for their servitude. Archimonde and Kil'jaeden accepted, but Velen, with the help of the Ata'mal crystal, foresaw the grave destiny of his people, and fled the planet with only a part of the Eredar, only to end up on Draenor, homeplanet of the orcs.
Now, that was a retcon back in tbc, as before then, the Eredar were already stated to be demons already, and their evildoings caused Sargeras to turn mad in the first place. Metzen, who simply forgot about that fact, apologized for that in a following blizzcon.
Considering all this, this leaves a lot of potential and opportunities for the draenei in forever, whether as a playable race or a not.
If they stick to what was established prior to tbc, they could use them as an antagonistic force for some future update, or make new lore, which could go in many directions. For example, they could go the tbc route too, just without Sargeras being involved in their exile. A greater involvement of the broken and lost would also be something to consider.
There's also the option of draenei not being included in the game for a long time, if at all. I agree, that out of all the races currently playable in any version of the game, they feel the most foreign, which can hamper immersion for some. I recognize that, yet I would feel that, as their lore has become deeply intertwined with orcs, leaving them out completely would feel a bit hollow.
I've seen ideas floating around of a group of draenei or broken ones to have fled to Azeroth, while the dark portal was open, and use that to establish them on EK. I like that idea.
Just - leave out the spaceships. That's all im asking.
What are your thoughts on the draenei in forever?