A new feature that I would like to see added to Clash Royale is a “practice road.” It would have steps and rewards like Path of Legends, but the key difference is that for each battle, you go against a bot, with both you and the bot having a set deck, with set levels/evolutions.
Each step would be a golden step, maybe minus a few at the end. These battles will help you learn how to use certain cards, a certain deck, or counter decks with select cards. It would unlock at arena 1, but to progress more in practice road, you would have to push to higher arenas in regular trophy road.
Along with this permanent mode, there could also be practice events with rewards, that only appear for a limited time, perhaps made by the community.