Why not add skins to the game? Why not allow for example a “demon skin” for demonologist/Herald of Xotli , a “vampire” or “lich” skin for necro, a rocky skin for priest of Mithra , similar to Conan Exiles avatar but in smaller size(same as the character)?
Some can say that there are already a lich form, but it have cooldown. A skin will be visual only without any bonuses or penalties. There are currently many different pets on the game, but i think that non human skins for characters will be epic.