Exactly what the Indians, Pakistanis and Bangladeshis learned by undergoing through it under the British, we will learn it in a few years down the road if we take that Federalism route, that is based on dividing land for different ethnic groups, and that lesson will be "divide and conquer". But for us, it will be too late for us as a disintegrated nation at that point to apply the lesson on anything good.
Instead of this kind of fruitless Federalism talk, we need a forum on how to restore the law and order in our country and how we as common people can erect a government power that can address the mandate of the common people. The better option is to maintain the existing heterogeneous society with people of different races, religion, professions coexisting in geographically diverse terrains containing diverse natural resources vital for the well-functioning of Nepal.
As far as administrative division goes, we do not need to re-invent the wheel. We can creatively and objectively debate with acceptable reasons on whether to continue to have 14 zones and 75 districts with or without five developmental regions. But the governing structure could be streamlined to remove redundancy and make it more effective, efficient, streamlined and yes decantralized. During the debate all different people with different background could have different inputs but the bottom line should be that we are all united by the common feeling of each of us bearing the identity of a Nepali.

That's more than two cents right there.