Have to say again that I do not like the idea of third person in FC. In fact I would probably stop playing FC if it went down that route. I enjoy looking down the sights and so on I believe that is far more immersive gameplay. Staring at a disembodied avatar is much less involving. The best way to see something like the original posters comment would be to see an npc beast riding. I would think that now Takkar has proven it can be done in the future others will gain the skill such as well a certain person shown at the end of the game - something that could be in a future DLC - 'Rise of the Beast Masters' sort of thing - or not
I don't think Farcry Primal would suffer if it had a 3rd person option like Star Wars Battlefront where you can change your perspective. I am color blind which causes things to be camouflaged from my vision so without the HUD & mini map which a lot of people turn off I wouldn't be able to play this epic game.