Damn, this is pretty interesting that they had to add the additional bridges.

Does that imply that the merge of two lanes is still too costly?

Also it seems the lane from south east to south west is missing :D it's somehow routed via north first and then goes around the circle.

> Does that imply that the merge of two lanes is still too costly?

Yes.

This one https://www.openstreetmap.org/#map=16/55.88495/37.47959 was built from scratch not very long ago. Notice how merges/splits are spread as far as possible.