Understood, trouble in the sense it causes performance issues.
From my experience loading gpx from ovepass as layout works nice in a PC browser. At a certain point, the browser gets very slow. Limitations on the smartphone are reached much earlier. It is a try and error thing. I would not recommend it to activate huge overlays on the smartphone.
I use just this procedure (extract data from overpass for my nearby area and displaying it as overlay) to plan routes to these points and ways. Not to avoid those, but to maintain missing data.
Helpers: Apps Streetcomplete, SCEE, self build gpx-voice recording with my remote exporting gpx, that can be used in OSM-editor ID.
The overpass query from you above is a really good starting point for the curious, who may want to invest some time and to improve the data - or just display data.
We also had here overpass queries to show ferry routes, just anything. Very nice combination with the overlay manager, it is a perfect tool.
