Try and get a grade for film out as well as a TV version.
If not go for a film grade. Retweaking a film grade for TV is a better approach than the other way around. (it would only take resetting some gammas and shaodow levels to get the film grade “close” to TV.
Keep a copy of non graded master.
Hard to comment beyond my general observations on the original camera setup lighting ect.
Someone who regularly shoots HD f900 may be able to let you know if what you did was in the zone or over-protective of highlights at the expense of shadow detail.
I’ve seen rushes from movies where there was no significant highlight detail above 80 ire. Not saying this was the case with your material.
Mike Brennan