18 minutes ago, Katsumoto said:hasn't the CryEngine been kept up to date over the years and still kept in play?
Crytek still maintains and updates their engine, with the latest release arriving in September of last year. Of course, newer versions of the engine will provide developers with additional features, tools, and options to enhance their titles (including more efficient/streamlined optimization).
However, IIRC, Armored Warfare's CryEngine has never been updated, which (based on development and release dates) suggests it's still using a version of CryEngine 3 or 4. This is probably a key factor as to why the game looks rather dated/appears similar to it's open beta state.
EDIT: Under the Wikipedia list of CryEngine games, AW is noted to be using a version from 3.6 - 4.
I've also played a couple of Sniper: Ghost Warrior titles, and while they looked somewhat better than AW, all of them were rather resource intensive.