It is sad that Cerva decides for all HH either they join or not. Since 2 months, on our whatsapp group (Paradox) the main problem was that it is summer and people use Sundays to go somewhere DURING the day and stay at home after, we missed a lot of NWs, but still those who were at home joined.
Let's all be honest for once, ONE or TWO hour earlier or later won't change the situation. If i joined this week at 17 GMT doesn't mean I will be here next week at 17 GMT at home, everyone's plans are changing. But I will never say, I can't join at "this time" and no Paradox will join.
Changing NW time in each weeks will make more confusions and might lead on even less players joining.
IMO the best time for nw, after reading all this posts would be 16 GMT.