550 members is ridiculous.
Somalia should have an 36 member legislature.
Somaliland appoints 7 members (2 from Awdal, Waqooyi, Togdheer, 1 from Sanaag)
Puntland appoints 6 members (2 from Bari, Nugaal, 1 from Mudug)
SSC appoints 2 members (from Sool)
Galmudug appoints 1 member (from Mudug)
Ximan and Xeeb appoints 1 member (from Galgaduud)
Jubaland appoints 2 members (from Gedo)
ASWJ appoints 1 member (Galgaduud)
1 member elected in AMISOM controlled Mogadishu
Shabaab appoints 17 members (2 from Lower Jubba, Middle Juba, Lower Shabelle, Middle Shabelle, Hiiraan, Bay, Bakool, 1 from Mogadishu)
Then THEY vote on a president, where the president has to get 2/3rds majority of the votes.
Presto, peace and unity in Somalia. If Somaliland doesn't want to participate then that's ok, make that a 29 member legislature.