3. The viewership will obviously take a hit. Imagine a day night match being played in England. A 2PM start that would mean the viewers in Subcontinent will have to stay late in the night to catchup the action.
not really
The whole idea is to make the time convenient for both the locals and the TV audience. In case of conflict, it will always go to a major audience.
A day/night Test can be a boon if played in Australia, New_zealand or even the Indian subcontinent