Making alliances in the duos mode sounds interesting at least. Not sold on the gameplay yet but I'll try it since it's free to play.
Though I get what you're getting at, the whole point of Amazon Games Studios is to leverage AWS, so all of their games will heavily feature if not rely on online connectivity in some way.I feel like new development teams need to release either a a single player or use an established IP for their first release nowadays. I just can't think of any multiplayer game released by a new AA or AAA studio that has released in the last 5 years that weren't poorly received.
Obviously, Single player games carry a different type of risk. But at least your game wont fade into oblivion when you only have 150 active players.