Pvp and derby (ranked) should be free as beastmoon event. But this places need membership or crowns.Change to free look as a bad idea. But if memership could change and be interesting for example: Normal wizard: ranked pvp and derby. Tournament no. Normal arena tickets. Member wizard: ranked pvp and derby.Tournament yes.Double arena tickets.
Other member benefit:
Free gift: each month a special item. This can be unique or a good item from crowns shop. Full speed: wizards have 100% speed. When member is active. Fast teleport: you can use teleport from map. If place have teleport in the map.