Thanks for asking about management of this profile. I am a co-Leader of the Medieval Project which would be the Project that would adopt it if Project management were needed, but I do not myself see a need for it: there is, as far as I am aware, no great controversy about the family of Jean de Brienne, so there is no need for Project protection, and the restrictions on who can edit pre-1500 profiles provide adequate safeguards. In order to keep the number of profiles it manages to a reasonable level, the Project has a very tight policy on what profiles it adopts.
When someone has time, like a huge number of other profiles of medievals, including many prominent ones, this profile could do with improvement by someone with pre-1500 certification. I have, I am afraid, no idea when a WikiTree member will volunteer to get round to this.