Yes the u23 was moved in 24, I recall spectators jumping out of the way at the last moment not realising the race was coming.
The issue is there has never been four races on the same day before.
Gent-Wevelgem infamously used to do seven on the same day (including a couple of non-UCI ones) and those weren't point-to-point routes.
The fundamental problem is that it's still very difficult to make women's races (not to mention the U23 and junior ones) profitable, and needing to run the whole logistical operation two days instead of one doesn't help with that (yes, there is the cyclosportive on Saturday, but that isn't subject to the same rules and logistical requirements - for starters, you don't have spectators to deal with). ASO have presumably been running the women's race at a financial loss for the past five years (Gouvenou did mention financial and organisational reasons when explaining the change), there is no reason for the local government to prefer the old arrangement (roads closed for longer, police operations required for longer), and it also requires either more volunteers or volunteers to be available for longer when it's becoming harder to find volunteers pretty much everywhere. That wasn't a sustainable equilibrium.
It's also another warning sign that the ground beneath women's cycling remains very shaky in spite of its growth in the past decade. We already knew the teams were struggling to make ends meet when even some of the bigger ones had to reduce their squad signs to cope with the new WWT regulations, we learned in December that ASO were struggling to make ends meet with women's Roubaix (not as big a deal for ASO, but it should be obvious that smaller organisers have similar issues), and now we're learning that it's having a greater effect on media exposure than already feared. For years, women's cycling was obviously in an upward spiral: I don't think it is anymore, and I also don't feel like it would take that much for things to enter a downward spiral instead.