Your speakers, both ATCs and Revels are very good indeed. I know what you mean about dry and precise and sorta anechoic-sounding. The upside is that the room treatment so far having cleared up the muffled sound, you are hearing the magical mids that you are. The feeling of dry and precise sounding will probably diminish with time as your brain burns-in to the new sound. Like you I generally favor neutral sounding gear, and do not use EQ to adjust it. So, sorry, I am not knowledgeable enough to recommend EQ software. It seems many knowledgeable folks on this forum like REW for digital room correction to remove any residual unpleasing resonances after the room treatment is complete. As for adjusting the sound to be more lively, REW should probably be able to help there too. If not, I think any parametric EQ software in your transport device or streamer should suffice. Though in your place, I would wait awhile until your ears adjust to the new sound before experimenting with PEQ.
I recently got myself Elac DBR62 bookshelf speakers, on the strength of Amir's high praise for them. They sound magnificent. I listen in the nearfield, speakers about four feet away from me at my desk, and the sound is very clear and tonal balance is superb, so I do not feel the need for room response correction. When I walk around, I feel perfectly fine with the in-room sound in my hopelessly cluttered living room. When I want more accuracy, I listen through headphones or IEMs.