1) All the points in the article are correct to the point. Partition should have been realized after completion of the preparatory works. At the time of partition, India was having one of the best civilian bureaucrats trained by the British, and Pakistan had none.
It takes many thousands of civil servants and many months/yrs to organize a new country. While India was bestowed with everything including an unitary/intact land mass, Pakistan was devoid of everything, and was divided into two by a vast Indian territory.
2) Calcutta was built on the sweat of the people of east Bengal. It should have joined east Pakistan. Or, at least, it should have been bifurcated into two, just like Berlin.
3) Britishers were not committed towards partition. Had they committed to the Pakistan cause, then east Pakistan would have comprised also of west Bengal and the seven states in your NE. West Pakistan would also have been joined by east Punjab and entire Jammu Kashmir & Junagadh. Moreover, Hydrabad would have also joined Pakistan. So, there would have been 3 regions of Pakistan: east, west and south.