I can assure you we broke through the 3 layer limit in x-plane.....
As far as the 25% coverage statement, not to sound to acute, how can you even quantify those results without having the product in hand.....I can assure you our dense particles and solid strataform covers very well...
There is a user interface with cloud density settings and draw distance sliders....
If someone is having poor results it may be a misunderstanding of the settings and they should seek support.....
Also rwc and SMP in conjunction display cloud positions as interpreted in a metar file, so if it's overcast in a certain spot, breaks in the cloud coverage may exist close by, this is a desired result and not a lack of cloyd coverage....