Why do they care if someone finishes the game? The sale has already been made.
Seriously though, I haven't had any interest in the Hitman series, and there is nothing whatsoever they could ever do to make me care about it.
Its not as if I don't like that kind of gameplay, I love Tenchu and other stealth games, but I just don't care for Baldy and from the info I've seen over the years I don't like anything about the series.
If I were a developer, and I had done several games in a series that so far has as its highest point the advent of a mediocre action film (and I'm not Capcom) I'd start working on a different IP asap.
When your own metrics, which I imagine are based on their own playtesters, tells you that only 1 in 5 people will finish your game, you are doing something wrong. You may have made the finest Hitman game ever, but maybe no one wants another Hitman game?
They would be lucky to find 1 in 5 people that has even heard of their series, and didn't assume they were movie tie ins lol