First let me say that this game is amazing. It really got everything I look for in a game, and I am very hooked into it.
What I love especially is that the design framework of the game really leaves a lot of freedom for designers to be creative and come up with unique experiences.
Somehow it reminds me a lot of the best parts of T.I.M.E. Stories , by being really sucked into the story and live a real "experience" with your friends, more than just simply playing a game.
However I find the mechanics and the longevity of this game much bigger even of that one, if it is exploited correctly.
The only aspect I find maybe slightly weaker than the rest is the investigation for clues one, where most of the time it just represents a skill test and you get clue tokens as rewards. For a game so thematic as Arkham, sometimes this feels very game-y and it could be easily be improved within the existing design of the game.
What I really would love to see more and more in the future is , as in T.I.M.E. stories, the presence sometimes of riddles or puzzles to solve, to make the investigation a bit more interesting.
The same concept is also present in mansions of madness, even if in a bit of a different way since there's the app involved, and more than riddles those are really minigames to solve.
You could have certain encounter cards or locations present the players with a riddle that could have several answers, and for each answer there could be an associated card. Players would have to solve the riddle and pick the right answer/card, and then deal with the consequences. Again, the already quoted T.I.M.E. stories managed to do this really really well into its "asylum" scenario, and I would absolutely love if arkham could somehow get inspired by the same mechanic and introduce it in a future expansion.
For the rest, thanks again for the game, I am having a blast and I plan to support it for long long time!