There doesn't seem to be much of an issue in the past, even with all those people. I wonder what could be causing this disruption in present-day crowd flow? Hmm...what is it??
That old photo above was taken on December 30th, 1969. The day before the very last day of the 1960's, and one of the busiest weeks of the year at Disneyland for the 1960's or the 2010's. There's not a stroller or an ECV in sight, everyone is just walking.
And...
trying to be kind here... even when there are tight groups of people walking together the 1969 folks are noticeably slimmer and trimmer than their 21st century counterparts; you can get five slim people in a smaller space at an adequate comfort level than you can get five fat people. Take the much larger sizes of Americans in 2017 compared to 1969, and extrapolate that out to 60,000 people inside Disneyland at the same time, and you've got less space per person in 2017 than you had in 1969 with the same amount of people.
Back to the Rivers and Big Thunder Trail... I just got back from a late afternoon stroll in the park after running an errand. It was crowded but not tragically so. I walked the Big Thunder Trail and in person it looks a bit different than photos or video, but it does look very good. The train rolled by along the new berm and rockwork when I was up near Fantasyland, and that looks even cooler in person than it does on video. It just brings the area to life and looks so uniquely Disneyland, even though it's an entirely new view and concept we've never seen before. It just seems like something Walt would have done in the 1950's if he'd had the money and foresight.
I went over to the Hungry Bear Restaurant, and a lot of landscaping work has been done in the last few days since the most recent videos/photos. That new riverbank looks really good! Still lots more trees and berms to be installed to block out the big Parking Structure beyond, but you can see how it will all fit into place a year from now when Star Wars Land buildings become cliffs and higher mountains beyond.
I also walked through Adventureland. It was still crowded and congested, but at least it flowed a bit better. They installed a
MASSIVE new King Palm tree where the Bengal Barbecue eating counter used to be. Adventureland changes looked very good in person, but I think that area will always be crowded.