ADD STUFF IN THE CIRCLE! Putt through 2 trees... Putt around a tree with a big anny putt... make that putt and you feel like you've accomplished something.
When I make a 40' putt I just think - finally, i threw one straight. When I make an anny putt I think - That was AWESOME - Did anyone SEE that!?
This is by far the best suggestion I have heard yet for making putting more intriguing to watch. Better design in general is the way to go in my opinion.
For a World's format that offers the possibility of hosting with fewer courses will we also potentially see a host who uses only temp courses? This could be interesting as you might see a parks department give premium land for temporary use for the event because it is the world championships and you end up with a couple courses that have not been limited by the use of limited land.