Jeff,
Yes it is since the GoPro does not shoot at 24p. If it did, this would not be an issue.
I can always conform that footage to 24p in Cinema Tools and then speed it up in FCP. That’s not really a big issue. I’ve done it before and it works fine.
This was more about trying to find the right sequence settings that would be best for mixing slow motion (at 720p) and HD (at 1080p).
Of course all will be log and transferred to ProRes 422. Sounds like just making a 720p timeline @24p and making sure all of my frame rates match that is the way to go.
Thanks everyone!