Ive always thought that your spirit form would appear as the one you identify with i.e.
Think native American, you go on a pilgrimage to the top of the mountain and your spirit appears to you.
Tauren would be eagles, bears, kodos, tallstriders etc
Draenei would be eleks, talbuks etc
Trolls would be raptors, devilsaurs, wind serpents etc
Seems like a missed oppertunity.
When you consider each race that can be paladins have a mount specific for their race yet DKS and warlocks are stuck with a horse.
Shaman are stuck with limited forms. Even more glyphs would be nice for elements like pandaren spirit forms.
The existing glyphs for shaman are a bit naff. The raptor is an old model would be nicer if it was like the Zandalari style modern raptor. The Vupine is ok i guess but it doesnt fit any race really.
The Lupine one is really cool but doesnt fit any race, maybe Earthen at a stretch.
It would be nice to change totem graphics too, to go with the Lupine model you could have Zerith Mortis style totums. Zandalari trolls could get silver and red totem colour to match the blood troll look.
Dwarves could get little hammers or anvils they throw down. Just nice options to fot different themes.
It actually annoys me that the totemic hero talent totem is a tauren style. How does that fit a Draenei Shaman.
On that point we need more raid sets that fit other races too not just trolls and orcs.