I definitely see the lawyer coming out. Overall, an excellent Constitutional draft. 
Besides some grammatical errors and formatting (dw I know English is your first language), I find issue with several points:
“The Security Committee is composed of six (6) members, PAL holders or not.
Its members are elected during sur Annual Assembly for three (3) years.”
Definitely would be wise to have all committee members be PAL holders, possibly also disclose their amount of $PAL via wallet address. Transparency = paramount.
I noted that you had written exceptions, mainly for members on a rotating basis, but I think someone elected to the position for 3 years, though ambitious and idealistic, needs to be lessened to 1 year terms.
Will require all contributors to pitch in but I love the idea of an annual report. Gives me Index Coop vibes.
Not sure how a security council style system can be put in place until full decentralization is possible i.e. hands off by the core team. It will happen but could be years due to technological barriers and not yet found innovations.