StreetComplete is fairly limited in scope (which is a good thing, considering its focus on UX and doing that single thing really well).
But there are a bunch of more “expert” features, such as the overlays, which allow for more focused QA work. And there's also a way of recording a GPX trace for missing paths or streets that will be added as a note for others to add to the map (or yourself, just not from the same app). Just long-press the screen and you can start such a recording.
With the places or things overlays you can also add new POIs in a limited way. It's still not a full-fleded editor (and as mentioned before, I think it shouldn't be), but there are now ways of doing more edits that were not possible previously, while not altering the interaction that much.
Yeah it feels like having a very focused editor with a polished workflow could help OSM get more people to contribute, although it would be very nice to maybe have an advanced mode I imagine. Places get new neighbourhoods all the time so it would be great to be able to rigourously modify maps from the same place you contribute from otherwise, although maybe a desktop experience would be much better for this.
I've noticed StreetComplete focuses on details to fill in an already existing street layout, which makes it feel like there are clearly separated stages to the mapping process. First get the basic layout down, then fill in more details like zoning and buildings, and then more details. I like the idea of that so far.
But there are a bunch of more “expert” features, such as the overlays, which allow for more focused QA work. And there's also a way of recording a GPX trace for missing paths or streets that will be added as a note for others to add to the map (or yourself, just not from the same app). Just long-press the screen and you can start such a recording.
With the places or things overlays you can also add new POIs in a limited way. It's still not a full-fleded editor (and as mentioned before, I think it shouldn't be), but there are now ways of doing more edits that were not possible previously, while not altering the interaction that much.