I don't think I'd go that direction but if you say it works I'll take your word for it since that's not something I do. I've experimented with spot linked metering photographing in dark music venues and did not care for the results. I'd prefer to have more consistent exposures and then sort the rest out in post.
I've done both, using fixed manual settings and hope it works, or try let the camera guess the exposure (I've shot maybe ~50 show total, so not pro but not newbie either).
My bodies are 5D4 (not linked to focus) and 1DX (yes linked to focus). 1DX does clearly better job when letting the camera deal with the exposure, and that's due to the focus point linked exposure. 5D4 you get much more under/over exposures. However, both cameras you get more consistent results just finding good compromise manual settings. But I can see the benefit of the 1DX metering clearly.
Often best is actually if they let me strobe and then I can set manual setting to -1EV on background, and strobe to +0EV on the model and let camera ETTL deal with the flash power. Especially on that the 1DX metering is much better, 5D4 again often over/under exposures. Plus 1DX tracking is better, so I don't mind losing 1/3 on pixels when the picture looks better overall.
Also if the runway is long and you're strobing, it becomes more important to meter correctly as using fixed settings is often difficult. (some places you have two presets, one for close and one for far and swap while the model walks (or bring two bodies and keep switching)).
I would prefer all my cameras did that, and I'm hoping R5 does it too since I'm planning to buy one.
