Just watched these over the last couple of days. Some really sphincter tightening moments with live traffic, uncovered junctions (a big roundabout with only one joining road having a moto marshal holding traffic, town centres with no-one holding side streets), a moto stopped in a spectacularly bad position at the side of the road on a 90 degree bend right where riders would swing wide etc.
It seems as though they simply didn't have enough marshals, static or moto. A rolling road closure can work very well, but you need a lot of bikes to do it properly - as an indication, for the big ones in the UK there's about 60. You also need the peloton to help the motos; I saw one bit, 10km before they stopped, where there was a line of motos up alongside the bunch on a wide open road, and the front bit of the bunch spread across and weren't moving sideways to let them through (which, generalising, does seem to be a bit more of an issue in women's races). Don't let the motos through, you don't get hazards ahead covered. But there could be lots of things going on there; earlier incidents could well be affecting the mindset of the racers and moto pilots, and everything goes into a downward spiral once you don't feel you're working together on the same team.
The big fail seems to be that going through a road junction or place of any size, especially the finish town, you'd expect there to be static marshals covering all the side roads - which didn't appear to be present. For the finish town you'd also have had parking restrictions in place, and vehicles being towed if left there. It all seems to come down to the organiser not spending the money to have a big enough marshalling team in place, or not having the experience to know how to properly manage a rolling closed road (early enough to have time to clear traffic, not too early as that makes drivers trying to go about their daily business grumpy and uses too many marshals, knowing how to deal with vehicles that leak onto the route as you won't be able to cover every single driveway - it's a complex thing).