Hello! Another person really excited about capslock -> hyperkey here. Pairing tap for escape is ANOTHER one of those features that has become commonplace with hyperkey users on karabiner, so this is an exciting development to see.
One last request on this that I would be absolutely ecstatic to see implemented is the option to act as Hyper Key (without shift). A shiftless hyper is another convention common among hyper key users since it brings that much more flexibility with the same infrequent hotkey conflicts for programs, with the added benefit of just adding the shift key right below for another layer of hotkeys.
Just registered to say thanks for implementing hyper key to capslock, even that much more excited to see tap functionality being implemented, and if Hyper (without shift) were added to the modifier keys this would be absolutely perfect!