Facts :
Betrayal's root is betray, which comes from the Middle English word bitrayen — meaning "mislead, deceive." Betrayal has to do with destroying someone's trust, possibly by lying.
"true to 5e" and "implementing it as pure as we can" (Swen quotes) : expressions, among other ones, attracting D&D players to sell EA.
Same for working "directly with players", listening to us etc.
Result (factual) :
Hello D&D buddies ! Today I play a warrior. I can heal like a cleric and cast spells like a wizard with my ninety scrolls. When I am hurt in a fight, I eat my bogies and I feel better. My bogies are very abundant, it is very practical. I can fart also. This is a magic fart. When I fart, I avoid what some D&D people call "AoO". And it is strategic too. I can flee with my fart, and I can gain advantage. It is fun. I like advantage. I do not need spells and complicate things to have it. It is good. You know, I just fart. Or I climb stairs or ladder. If my buddy is down, I touch him, and it is ok. Buddy's back. A dozen times if I want. Touch. Cured. Touch . Cured. Otherwise, I throw a potion on the buddy, et voilà. No more need of what D&D people call "healing word". Oh I do not need what D&D people call a bow and a sword. I can cast grenades, powder barrels (it is better than this old and dusty D&D fireball), boom boom, they are all dead. It is very fun. I don't know why D&D people want 100% of rules. What are D&D people complaining about ?
(Of course, it is a limited list)
