Instead of adding features, they should be cutting them. C++ is 27 years old, yet there still isn't a full production-quality implementation of the specification. And they carry on regardless, adding more and more features.
C++ could learn a lot from the way Python is managed. PEPs, a reference implementation, and an individual with the power to veto - to keep the language heading in a single direction.
If Guido puts a feature in CPython, that's a iron-clad edict to all other would-be implementors, because CPython has a huge majority market share. Not implementing the same feature means you aren't implementing python. There is nothing equivalent in the C++ world so no one has power, either through standardization or implementation, to single-handedly steer the language.
In fact there are members of the standards committee who do control a language implementation, like Herb Sutter. The committee is full of prominent members with intellectual capital who exercise their formal voting rights as well. There is no dictator.