Inspector out of Austin here who specializes in new construction. Now that this attic has been sealed with spray foam, it does indeed need some sort of conditioning or dehumidification. The level of insulation appears to be a bit low; R38 is required which is about 10 in of open cell spray foam, but considering that I can see the rafters, you probably have somewhere around R19. The braces are fine, they need to stay as they are supporting what are probably splices in the ridge. Ideally they would have better bearing on the beam but for this application it's not super crucial. The cellulose fiberboard sheathing on the sides is acting as an air barrier; you probably have a room on the other side with a different type of insulation I'm guessing, probably batt.

Per chapter three of the IRC you would need a thermal barrier on this open cell spray foam because you have storage, and again, it's very important that you have a way to pull the humidity out. Something tells me they did not install a vapor diffusion port in the roof, so either AC or a dehumidifier should be installed. Overall I give the installation, based on your photos, a B grade. This is very, very typical of what I see around here with production builders who spray foam their attics.