For the success of any biopic, Believability is going to be the key. The Actor who is playing the lead role must have close resemblance or else viewers don't feel the connect.
Tapsee neither looks like Sushma Swaraj nor have the stature to get into her shoes. May be, She could reach that level in the next decade or so to attain acceptability.
Who would have imagined Tapsee would do films like 'Pink', 'Baby', 'Game Over' and 'Mission Mangal' upon watching the way her career progressed in Tollywood. Never ever underestimate this Talented Actress!