With MTB, i think POV footage is not a good format to attract viewers. If you are not a seasoned biker (and preferably even know the trails being ridden), POV Gopro clips are hard to follow and often boring because they make everything look flat and unchallenging.
And obviously GoPro vids without a gimbal are just garbage.
Good EWS coverage probably needs a lot of cameras near the track and ideally some drone "followcam" vids.
I like the WRC format. A big part of what makes it work is that it is not totally focused on POV footage. Having the option of showing in-car footage also helps.