Lots of trails here have a bunch of little jumps that require tons of speed with the occasional short steep fucker that requires very little speed. I personally do not have the skill to brake into a jump face or somehow scrub and pump to clear the gap without getting thrown out the the front door. But I know my limits and can scrub the jump and pump over the landing at speed. I don't know maybe it is all intended to just be a pump track for slow people.I had something similar happen on livewire (tehawesomzjumptrail) at northstar. Came upon the dude snoring which if you know concussions is the autonomic nervous system trying to keep someone alive when all other shit is straight shut down. I was the first one there and knew who to call and they showed up and took over with an eventual helicopter ride. The thing on the front of his head couldn't generously be called a face anymore. Trail bike, of course.
The problem isn't the concept of flow trails. Let's be honest, they're all based on A-line from whistler. Every dirtjump spot ever made is a 'flow trail'
The problem IMO is that everyone wanted A-line for the masses without understanding what A-line actually is and was....which is a straight delivery of hardtail dirtjump crack for mountainbikers who know what they're doing. All the very accurate problems you list stem from not understanding that flow trails never were for beginners. Throw in the local trailbuilding gentrification group in your area who I'll refrain from naming who genuinely don't know what the fuck they're doing in terms of making big things safe........and you end up with this shit soup.
The trail at northstar has A-line/dirt merchant sized jumps and not a single one of them fits trail speed. They cart people off that thing daily. There's an inherent danger in bikes, a little more in jumps, and it gets exponentially worse when those jumps are built by hacks. Now throw in a population that thinks any facility that is built is done by professionals and you get the clusterfuck that is modern mountainbiking infrastructure.
I did have a blast bouncing off roots all morning.
I