Why does the game need another Paladin when the game already has 2 in Uther and Yrel? Out of all the class representations, Paladin's the absolute rock bottom the game needs right now.
Another importance of new hero design is role, and how the inclusion may shift the meta - Hogger is likely to be a Bruiser and going back to your argument we already have a Paladin Bruiser in Yrel so it's absolutely not what the game requires, it's personal preference you're arguing.
Hogger is a universally known character which coincides with the launch of Shadowlands so it's a very safe choice.