I won't deny that Microsoft probably had its hands in Halo 5's development, but I feel putting too much blame on them when we have no real idea what they did removes 343's own poor storytelling in Halo 5. Honestly, 343 in the past has shown they can make poor decisions without Microsoft needing to step in. As far as I'm concerned, LateNightGaming doesn't have much credibility to me, especially after he claimed some random from 4chan was legit as an ex-343 employee, since confirmed fake.
Actually, LNG said on his Twitter that the 4chan guy was a fake before many others new that. The less you guys believe and don't give attention to Microsoft's meddling, the more games we're going to get with little content and last minute re-wrote story.
Isn't he the only one saying it's fake because his information contradicted what 4chan said? There's no proof one way or the other if 4chan was telling the truth, but LNGs credibility would be shot if 4chan was telling the truth, so he claimed that guy was lying for his own benefit. But like Dr. Halsey said, if he does have sources, he clearly doesn't do much to confirm their legitimacy or their information, which doesn't make him very credible.