one funny thing is that Epic started to integrate Twitch, but the Twitch SDK was withdrawn not a long time ago, so it has been stopped...

imo AWS integration is cool if you don't want to maintain your own server park. and selling games at Amazon could be something like Steam integration, but probably easier to implement networking stuff thanks to the integration with AWS.

but the workflow is the same as of Cryengine, you need Max or Maya, and maybe Photoshop too. but the audio and GUI system are custom, which is a step forward (as I remember CryEngine uses something for audio that requires a license, and the UI stuff is Flash/Angelscript, but not for sure, I checked it a long time ago).

to be honest I'm currently satisfied with UE4, except the high hardware requirements, but this lumberthingie has even higher.