Hi Tony all I did to both bikes was have the tyres changed to Magic Mary's and made tubeless and I put a new Ergon saddle on both bikes and upgraded to a 700wh battery on both bikes and the rest is stock.
I don't feel the need to upgrade anything else as for our riding the bike is perfect, we did a 46 mile off road ride last Monday on the North York Moors and both of us finished it with 27% battery left so that was great to know as we won't have any range anxiety
I also think people upgrade for the sake of it when the bike is just right as it is