The Swiss evaluates hiking paths as a whole. (so from junction to junction). If a path from A to B is T4 for only 20 % for example than the Swiss will mark the path as a T4. 

In OSM people (sometimes) split up the path from A to B and start giving each section its own sac-scale.  This is fine by me. But will of course lead to (big) difference with the situation outside. Long story short. What you wrote in your last reply is perfectly fine by me and in that sense very similar.

You can change your hike in the Jura near the the Grande Ecoeurne to an T2 but according to https://map.wanderland.ch/  it’s a T1.

If have seen Swiss hikes transition from T5 with first grade climbing to T2 in mere meters. I did not (yet) (micro) map that. 

To get back to this hike. If the hike is unknown than splitting and evaluation is of course even harder. Tagging everything with T3 or T4 or nothing and/or closing the note is fine by me. Not being able to solve it is no problem for me. See my previous reply. I trust you. So you can do whatever you feel is correct.
