Dear Hooligart, now that you make a lot of changes and just slowed down the Colosseum (I mean we have to fight much more fights to get the decreased result), you might consider to make easier to start a fight.
As a Colosseum player I would like to have a "Retoy" button on the screen where I assemble my deck for the given fight. It should remove all toys from all cards (the same function as the "Remove all toys" button on the Collection/Toys screen), THEN equip the best toys for all selected cards (the same function as the "EQUIP THE BEST" button on the Toys menu of the cards, just should be called iteratively for every selected cards - the order doesn't matter, so it can be done without user interaction).