Hi @mas985!
There is nothing wrong with y+ well below 1 if you can afford it but being at around 1 is always recommended. Also this value depends on which turbulence model you are using and which type of flow you are investigating. So that should be fine.
About the “node” question: There are two types of Data, cell data and point data . Cell data is the ‘raw’ data produced by the solver and ParaView correctly displays this by showing each cell filed with this scalar value. Point data, however, is interpolated data based upon cell data, this allows ParaView to display a more visually pleasing gradient. - Source: Post-Processing: Data Types
For the representation in the post-processing viewer let me reach out to my colleagues to make sure there is nothing broken. Will keep you up-to-date!
Cheers!
Jousef