For more reasons than one, this is a better name. For one, it's easier to spell. For two, the 'd' in the middle gives it a nice point of emphasis stronger than the earlier 'r' and for three, 'Odisha' is how the people of Odisha pronounce 'Orissa'. So it makes sense. (Names are more memorable when spelled the way they sound. ex: Orissa v/s Odisha.) Incidentally, Oriya is now 'Odia', which in my opinion is not as memorable as 'Oriya'. (It's complicated and can be explained only in an elaborate Powerpoint presentation.) All said and done, what do names, and name-changes, like Odisha, Chennai, Kolkata, Thiruvananthapuram and Mumbai say about the principles of naming? Think about it.
