I think it's perfectly fair to ask for a refund now if people were expecting better and aren't satisfied.
You have a 2 week window to get your refund, and you need less than 2 hours played. If we look at any other refund policy, why would you wait to return a faulty/broken item? You can always buy it again, you refunding it just shows that you were willing to fork out the cash but didn't because of a failure on the product.
I see some folks saying there's a lot of apologist-talk going on, but I just want to make it clear: I just don't want anyone to blow things out of proportion, especially because let's be honest: it is such a subjective topic, for me the game as it stands works and I'm okay with that, but I won't fault anyone for expecting better of their PC versions. If you've bought it and aren't satisfied, get your refund. If you haven't bought it yet but are concerned, see if there's any way you can play it beforehand just to see if it works, and if you're not satisfied, you can always let NISA know via feedback and hopefully they'll respond accordingly.