Agree. Especially it’s bad for motive foliage, speculars… etc. rendering.
From:http://docs.cryengine.com/display/SDKDOC1/EaaS+3.7.0
CryEngine 3.7 seems to be also using a Temporal AA method, but maybe UE4 dev team need to do more research on how to avoid blurring and ghosting effects mostly of the Temporal AA.