This will not be settled with Saudi air strikes. All they are doing right now is slowing the Houthi and keeping them from grouping as they want.
But to actually get them out of Yemen somebody will have to put boots on the ground.
The only people in the region that are even remotely close to being ready to do that is Egypt right now. But they have had so many problems with the Muslim Brotherhood it is unwise for them to do so.
Saudis can't because they are under threat from ISIS.
We won't because .. hell right now we are courting the wrong side of the whole equation backing Iran who are actually against this whole intervention.
The Middle East has not been so destabilized in the past 60 years - the fruit of Arab Spring ...