XCTrails is updated every 2-3 days; at time I don't see any change.
Ragardless of XCTrails I see a big problem in that the main relation is no longer shown completely if I call https://www.openstreetmap.org/relation/10588521 (only one sub-relation is now shown). But such links I and others use for reference to the complete via ferrata  which is no longer possible in the case of so called "super relation".
As far as I know, these are actually only used for very long and complex routes (traffic connections, long-distance cycle paths, ...).
As far as I can see, your enhancement mainly concerns the color coding of the routes. Why not define the color as a property of the individual segments?
In this respect, I would very much welcome a return to a simple relationship :-)