What made Syndicate unique was its setting and the fact that it had minor tactics involved in the gameplay - simply blasting everything in sight with a minigun wasn't always the most efficient way of clearing a level (but often it was of course).
And now its turned into an FPS. Well the setting is still cool enough, so as long as they make it like Deus Ex as much as possible (simply because that is more fun than the average FPS), I'll play it.
Next up: Jagged Allience FPS, Crusader: No Remorse FPS reboot and heck while we're at it, why not a Wing Commander FPS eh? as long as you can sometimes fly freeform in a spaceship it will have enough ties with the original...