Henry
Autoexreginated
I just want to chime in a moment.
I think there is a gigantic disconnect going on here. Changing rules around and making rulings when the rules aren't clear is not the same as allowing 3PP/fan made material. You can create house based rulings and still stay with in the official framework of current D&D.
As others have said, the only difference between house rules and homebrew is matter of degree. That paraphrasing of Mearls' I couldn't find was to the effect of, "The secret for DMs is that they don't really need us." (speaking of the designers.) And the only difference between a Dungeon Master and a 3rd Party Publisher is the 3PP is a DM who is dissatisfied enough with existing material to make his own. And the only difference between the 3PP and a 1st Party Publisher is he's a 3PP who owns a brand and maybe a few more resources to playtest.
These days, I seriously doubt any one option is playtested more than a dozen hours in-house. There's just not personnel and money to do it. So just think - the main thing that separates a class option from Wolfgang Baur's Southland Heroes from a Battle Rager from SCAG - is a brand label.