Please, do not imply malice on my part. Because I do try to understand your position, but as I didn’t (in this thread which I follow) found other arguments you might have against highway=demanding_path + demanding_path=scramble in this thread, and you didn’t mention it when asked about, I assumed there were none. Please do let me know if you have some arguments against such solution (other then already mentioned “two tags are more to type than one”)?
I’ve already stated in the other thread on this topic:
Perhaps that might be the reason for me not finding your other statements on the matter: I’m not omnipresent 
I see I have another 77-long-messages thread to contemplate, hopefully some gold nuggets might be found there which are missing here. It will take some time for me to process it, though, so please do let me know if I reply in a way that seems like I’m intentionally ignoring your arguments (I assure you, any such failure of mine is due to omission, not malice).
Oh, have I known it sooner, it would’ve saved some replying here! So, I gather from this short quote that you are not in principle against such idea? (I’ll read up details from other thread when I get some time).
To quickly comment on it as to not leave you hanging: Yes, highway=demanding_path + demanding_path=scramble is wider proposal than the original one by @Hungerburg, but that is very good IMO – main purpose of Proposal process is indeed to bring together potential tag users from different backgrounds so the more generic tag solution can be found (as it is much better if 1 proposals of 2 tags can solve 5 different needs, than if there need to be 5 different proposals, each aiming for 1-tag solution just for their narrow field of interest).