The new Legend is a bit smaller than the Supernova but better designed so you can fit about the same amount in and not lose it in a big pocket. I am trying to slim down my match day kit anyway. Maybe have a small bag of spare bits for emergencies in the car.
I've not attempted to pack the Legend fully yet but I think it will take: keeping and batting pads, thigh guards (I have some Stretton's on the way to replace my bulky Aeros), two pairs batting gloves, helmet, spikes, keeping gloves and towel, wash bag/first aid kit.
I can't believe people have more than one bag. I assume they are playing much higher than me. I prefer to use my kit (except my best bat and keeping gloves) for everything but change it more regularly. I have a small box with my spare gear in that my bag sits on at home, that's it.