I think the majority of the disruption so far has been at weekends. It seems to take quite a while for the press to notice things that only happen at weekends, unfortunately. Though I imagine after this past weekend that someone will have it brought to their attention soon.
I'd assert there is more disruption in rush hour. At the weekends, the 'disruption' is usually planned and you can navigate around it to varying degrees.
Certainly on Thameslink, it's the persistent issues during the week, particularly rush hour and after which are the most disruptive and there is no way to avoid it if you need to get home from work.
Tonight's trains were absolutely awful - I counted one train in two hours (instead of 8) for my service. This was due to the DOO/guard issue on the Sutton loop I believe and additional issues due to trespassers on the line for a couple of hours.