To be honest I think a fair amount of scepticism is warranted when anyone delves into a project that is a far cry from what they've made before, but I think the staff behind this have really pulled it out the bag. The 'beta' footage has lots of attention to detail and clear displays of passion on show, whether successful or not I admire that and it's nothing we should be hedging bets over, whether it's enjoyable for years or the flame dies quickly I can see I will still definitely have fun with it, and for how long is nothing I'm concerned about. Short term or long term, fun is fun, I'll definitely try it without reservation.
It's impressive what they've done so far, and making something they themselves are clearly enjoying is a good sign that it'll only receive more love and attention for the foreseeable future. I'm optimistic.