I've yet to find any popular 3PP that isn't more powerful than anything a hypothetical WOTC might have published.
"Anything hypothetical WOTC might have published." Is a tad vague don't you think?
They made a design choice based on feedback from the public. Right? Wrong? It's a matter of opinion. I think it was the right choice. Between subclasses, backgrounds and feats we have a reasonable amount of flexibility.