Saver node limited to OpenEXR?

I must be doing something terribly wrong. Finally, finally, finally the saver node was added back to Fusion, and like an excited tortoise about to cross the road and get into the grass, I was blindsided and squashed in an instant by a semi when I realized I can only export OpenEXR's?? Surely that cannot be right! Where are all the options??? I need to export DNxHR 444 w/ an alpha channel :'(

Added initial support for saver nodes in the Fusion page

This is from the release notes.

I believe other options would be added later. No inside knowledge, of course, just a guess based on the release notes.