Hello mapatite and Thank you for noticing this.
I've decided to change those highways to what they were before. These roads are classified as CF (Caminho Florestal en: Forestry road) and are managed by a government entity.
The forestry roads generally are wide enough and smooth enought for regular traffic.
In this instance they are even an option if one would want to go from Fajãzinha to Ponta Delgada.
The thing is that this type of forestry road with a regional classification and a clear interest for routing doesn't quite fit within the portuguese mapping standards as the road network is managed very differently in the Azores compared to Portugal mainland.
A proposal for mapping standards regarding highways in the Azores, and subsequent discussion and approval has to happen before a more systematic edit is made to the forestry roads and agricultural roads.