Haven't noticed any graphic updates on my version.
The new areas have been disappointing, only one level or so unlocked at a time, and all the recent new characters have been repaints of earlier ones.
And when you have the new characters you don't get to play with the earlier ones as much - I haven't played a level with 'Red as Optimus Prime' in a long time.
So I'm spending coins on upgrades at the moment. Also, every four hours each 'free' location generates 400 coins for your bank.