Classes are VERY niche protective

[ExploderWizard]

I think you've got it backwards. Its not about niche protection, It's about breadth. Each class is broad enough to encompass a lot of character concepts. I'd rather not have the 4e style where each class is a very specific archetype, so you need 100 classes to let people play the character they want.

It'll be interesting to see if D&DN uses subclasses as in 1e, or groups as in 2e, or all base classes as in 3e. I think I'd prefer subclasses, but that seems unlikely at this point.

Gotta spread some around.

A broad class covering a niche leaves a lot of design space for themes, backgrounds, and other options without the need for whole other classes.

I will be happy to see less class bloat.