Writing paragraphs in heroesfire or Reddit takes a few hours at best and a few days at worst. Actual heroes need concept arts, 3D hard models, soft models, animation, more art for splash art and talent icons, voice dubbing, translating, yada yada. And that’s just the artistic side.
Then you’ll need to balance them, look at their numbers, bug test them, code their abilities, etc.
A skeleton crew split over 5 different games with barely any funding can’t afford all of that.
Now if they decide to outsource a lot of these things by allowing the community to make their own actual heroes as rough concepts (like StarCraft or Warcraft editors), then maybe we’ll be having a different discussion