Khalid it wouldn't work.
Here is why:
If MJ and Merehan Join this new mamul, they will make up 35% of the population of this new mamul.
Add in leelkase and that is 40% of the population of the new mamul being Darood
If there are elections Hawiye won't stand a chance, because MJ and Merehan can truck in voters from Shilabo and Wardheer. Think about it, Darood would then have three federal states instead of two, and Hawiye would only have one.
Hawiye, in a few years would lose political control of the new federal state.
They will never accept this, leading to another war in the central regions.
You should always look at state formation from a long term perspective.
it is better if we keep things as they are