I would like to be able to attack my own base to see how it defends. All you need to do is just have a sandbox of free troops and be able to choose certain lvl troops and what troops you want to use. It would also give people a chance to play with troops that all the champion players use. Obviously you couldn't get loot or lose loot or go online to gain loot. It would just be a fun and constructive way to pass time and test your skills without having to wait a long time for gowipe or gowiwi or balloonion to train
It would even keep people on the game more. Spend more gems. And then supercell makes more money to make new updates to make some of our ideas come to true