The areas you were talking about with the bottleneck are indeed problems, they do however sit on areas that can be used as walkways with a little adjustment.
The Saloon sits on the road with the restaurant seating across the street, reclaim some of the area around the waterfall and remove a line of tables there, they can also build and additional raised rock bed to serve as seating between the road and restaurant seating to keep the walk separate.
The Flooded mine is also an area that can be adjusted, move one or all of those stands back, the area there can be built up on the Echo Hollow side to accommodate the adjustment without doing any harm to the park. There is space to adjust and they must in the future, although its over due. I noticed this year they are adjusting the size of the raised beds to open more walkways, specificaly in front of the furniture store, this is a good move. I am a huge advocate of flowers and the like but these can be built on the sides of the streets. They double as benches as well.
As far as the river area I have rarely seen all the seats in the BBQ picnic area filled, they can also move this back to increase the walkway.
Is my thinking off or isn't this all possible?