Great news!
Still, by "optimized default key bindings" I'm not sure I understand what you mean. The default key bindings for both Metal Gear Solid titles is pretty awkward, though it can easily be sorted in Metal Gear Solid, and with a bit more effort (not using the unofficial fan patch) in Metal Gear Solid 2. In Silent Hill 4, though, the key bindings are... fine? Not sure what the optimized default key bindings for that game would be.
Anyway, my guess is that this only affects those with controllers, which is not my case. Awesome news for all of those who want more options in their games, so, a good day for all of us.