Was there any reason you chose to route Calcutta to Yangon (Rangoon) direct?
Probably around five hours around the coast but you could have stopped at Chittagong?
Yangon has changed a lot. I was there a few weeks ago and still like the city. Some wonderful old dilapidated colonial buildings soon to be restored with the return to semi democracy.
How many days did you allocate at each stop? The sightseeing must have been an important part of the journey?