I agree with what Kolanaki said -- it should be available simply because it existed, not just because people will want to play some version of Crysis. My preference is that each patch-level version of a game should be made available somewhere for people to check out. It's not simply about a product being available that satisfies some need or desire (in this case, the desire to play Crysis). Works that people have made should be available for others to explore.

Also:

If there was no alternative, and debatably superior

is that true? I'm genuinely asking. I think I actually own the remastered version of Crysis, but I haven't actually played it, as I also have the original on Steam. I thought the remastered version was a graphically improved version of the console port of Crysis, which made some changes to the way that your powers activate. And I remember everyone disliking that when the console ports first came out.