They didn't only make administrative work in the Demon's Souls remake.
Their XDEV Japanese team included the creative director of the remake, producers, artists, animators, designers, programmers, audio staff, localization, QA and so on. Plus as usual in any Sony 2nd party title, the XDEV (short for "Extrernal Development") team also managed the many support/outsourcing teams who worked in the remake.
Bluepoint (plus many internal and external support/outsourcing teams managed by Japan Studio's XDEV team) was in charge / did the heavy lifting with engineering and specially art even if other support/outsourcing teams did work in these -and many other- areas. Being a remake, the engineering and art are the most important parts.