Yes. The CR system is fuzzy at best and has always needed individual adjuatment based on party so it is unaffected, and an individual Monster only lasts 2-3 rounds of Combat so is also not impacted. Same with Adventures, they need individual tuning anyways, so a minor boost like a single Feat doesn't matter much at all. It's worth noting that we are in the fourth year of juat about evwry product giving away first Level Feats anyways, and it hasn't had a big impact (though we are also getting more consistent performance form the newer Monster design, so thst balances out).Do the 2014 CR system, the 2014 Monster Manual's creatures, and 5E's adventures work with the assumption that every 1st level character gets a free Feat?
Black Flag giving an extra Feat every few Levels (see their latest design diary) will make a difference at some point, though not game breaking at low Levels. And that's my point: both Black Flag and OneD&D are making changes, but Black Flag's are bigger by the numbers in spite of their rhetoric about how much OneD&D is changing.