Ok first and foremost I think Megaknight should be deleted from the game as it is not effective or interesting at a competitive level and I’m sure makes many free to play and non-competitive players quit the game. I understand you may not want to do that because there are some players that really like it (despite that I genuinely think the player base would increase without the card). I would like to see the jump range decreased to something like 2-3.5 tiles. This would be a buff in that it could not be kited so easily by high skilled players but also make it more difficult to get on tower so it isn’t used as a win condition by unskilled ones. Also please god kill evo megaknight or you will legitimately lose so many players.
I know that’s more of a balance change than a feature so a feature I would like to see is something like a permanent classic challenge that does not cost gems. You could also make it not give really any rewards to not make it too OP. Despite only costing 10 gems, most players on low ladder don’t understand the challenges and don’t want to do anything that costs gems especially if it is just playing games that they could be playing to push ladder. Giving them a free challenge would help them to understand interactions when all cards are the same level and let them practice with new decks. Also even as an ultimate champion player it can be hard to win classic challenges so a free challenge without many rewards would make it much easier for newer players to get a sense of accomplishment.