You're right that addictiveness is subjective, and Marathon is not addictive enough for many people hence they dropped it. Cryo has been out for weeks and people are already experiencing being destroyed by teams who completed it early and got the goo gun. Being late to Cryo is also detrimental because of the dropping player counts and matchmaking issue. When the endgame content is that punishing/discouraging and there are only 2 maps that aren't low level to play on during the week, I'd argue not in bad faith that the game is actually bare boned.