I’ll throw in my studio’s vote as well for Blender support - though I will add that I’d like to see direct Blender support in general for UE4, not just Datasmith.
In Unity, for example, Blender is supported by silently calling the Blender FBX exporter with the right parameters and importing the temporary FBX. Unreal, IMHO, though has a huge potential opportunity with Blender users - the Blender Game Engine was recently officially killed off and with UE4 source code being available (even if its not “open source”) having direct Blender support would be huge within that community I think. Especially with Blender 2.8 hype I personally see Blender being used more and more in professional settings.