Hi ZOS,
I know you are already planning for missing race companions but I have a few ideas on companions and expanding people's options.
As I see it, companions are basically a long-game special attack DOT that players get so whether or not the companion speaks or not it wouldn't necessarily matter (it might save on some voicing talent of the companions too if needed).
1/Racial companions that you find in all the specific racial areas - e.g a Bosmer's companion from Grahtwood/Greenshade etc. or a Khajiit's companion from Southern Elsweyr.
The twist to this could be these companions could be animals or monster types. That Bosmer companion could be a forest animal or even a Lurcher; that Khajiit companion could be a Pahmar-raht or a magical Alfiq.
2/Gear options for animal/monster companions could be different thus providing more option to hunt for their gear. In regards to this, you could maybe find companion gear via the antiquities system. So you'd have to go searching for related areas for parts as normal for antiquities.
3/Why stop at a few of them? Go nuts with the options for people's choice. (I know this one would take quite a bit of effort on your behalf to code etc)
This would serve at least two purposes:
1/It would give players a reason to go back into the more "dead" zones of the world.
2/It would give players a "cool" factor for their own benefit of RP/class matching/housing-placed characters
Anyway, thanks for reading.
Gruumsh, Gruumsh, Gruumsh, Gruumsh, Miiighty Gruumsh!