I personally don't think virus and similar issues is an overblown issue. The problem is, I don't know how to make sure it is okay, other than taking your word as a random stranger in the internet (don't take it personally, you know how I mean it). I even was on the FitGirl webpage and thought about it. But everyone their own. I can't buy on Steam anyway, so it's not even my decision. Didn't know it was such a hassle. If the game does not run, why don't hey take it down from Steam? A Remaster makes perfect sense here.
BTW I also have the original Ghostbusters The Videogame on Steam, but can't finish it because it stopped working. They took it down from Steam (I can still download and play) and released a new Remaster instead fixing the game for their owners. I wait until the game is very cheap and buy it again. I hope this won't be a similar issue with Bloodlines, I hope every owner gets the game for free or at the very least a discount.