Optic cammo is a staple of the genre, so it will be in the game. But I would also like to see different qualities of it and having rain and anything that can "paint" the silhouette be their weaknesses. Also cyberlegs that don't make noise when walking running... but what about clunky cybernetics that make you more noisy than being a natural by having them be too heavy or their joints buzzing a lot?
And don't forget that stealth isn't only about escaping detection by human eyes or ears or similarly working technology. Hacking cameras not to have them disabled, but to give erroneous feed, etc. The Nameless Mod (Deus Ex) had guards checking the feed of a new-but-old kind of cameras, instead of just the intelligent cameras that trigger an alarm. Also radar or heat invisibility or exploiting the weaknesses in the programming of simple robots (robots that only watch for moving objects, robots that believe you have permission to roam an area, voice recognition, commands and killswitches...).