This moves my memory back to the earliest days of Mosaic. When it was introduced it was cited as not being an all singing and dancing app but a straightforward basic way of providing what most people needed to hear music. If further options were/are required then dCS have ensured that all of their devices are certified Roon endpoints.
Of course Mosaic is not a final statement and development work continues. As for reviews and updates how many do you want? After all the last was only 21 days ago. There have been one or two updates which include new options every year since its introduction and I am sure this will continue.