It's a very sad read, as a game dev my heart does go out to those involved. Making a game is a stressful endeavour, its often said that it's something of a miracle that they come out at all in the best of times, but with everything else they're dealing with I'm surprised the studio is still around.
A few points, it isn't so much that Frostbite is inferior, it's more that it just isn't equipped to deal with what they needed. It was all well and good EA wanting people to use a shared engine, I completely understand that but Frostbite was made with a certain type of game in mind and not others.
Studio I work at has its own engine, it's good for what we need it for but I don't think we'd be making an RTS any time soon with it.
Also it's really sad to hear about the divides between the three studios. This is something you really don't want. They need all three to pull together and be seen as one unit. They need an attitude of "We are all one, we all need to make this the best we can and work together and trust each other"
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I do have Anthem and I actually do enjoy it, it's not great but it's good fun with a friend. They did nail the flying, which is incredible given the flip flopping they did on it and I think with a little bit of love it could be pushed to being great. I hope that the events of Andromeda and now this give them the kick they need to reorganize and be better going forward.
They need to work on a few things, looking after their devs, bridging the divide between studios, giving a bit of love to their game and also working on the relationship with the fans. I believe they can do it, as a dev I hope they can do it because it's been very sad to read about studio closures recently and I don't want to see the same happen to them.