Yep. Most bosses are set for Hard mode right now. Sort of. Crystal Mother is a bit of a violent disaster at the moment, because oops, so I need to fix that, but..... feh, I dont feel like doing that at the moment. There's hard-mode enemies to test.
The Warden wont have a hard-mode specific thing yet because it essentially already IS hard mode, and Terminus/Sentinel/Palisade havent been touched yet. Uh, and Wallmaster. I think that's it? Most are ready to go at this point. I think most of those are available in the build you have now, actually. Only the two in this topic were done today and not sent yet.