I wonder why we want to get rid of valuable info here? Before I was just adding extra flavours to the projection code e.g.:

```
  new ol.proj.EPSG4326('EPSG:4326', 'neu'),
  new ol.proj.EPSG4326('urn:ogc:def:crs:EPSG:6.6:4326', 'neu'),
```

but am open for discussion on this.