Well What can I say. My room is flawed and I prefer a warmer tone with a texturally rich midrange. I like some bass bloom as well. Live music has this. And how can you really know what engineers wanted. They use different gear and studio monitors which are really not good for home listening as they are very flat.
I do own a Schiit Lokius 6 band tone control that is totally transparent when the settings are flat or you by pass it. It has XLR and RCA in and outs. I use it to tone down some sibilance with one of my 2 dacs on certain recordings and it works great for that. Otherwise it is bypassed and you could not tell that it was in line. Just turning a frequency down by 1.5 dB makes a difference with sibilance. I do not use it for vinyl or with my Levinson DAC.
Everybody has their likes and dislikes. I could care less about how an engineer wanted the music to sound like because so much music was recorded poorly. I want it to sound good to me in my home environment. That is no reason to be snarky about this.
If you go back to the 1970's, most the major receivers like Marantz, Pioneer, Sansui, Kenwood and Technics were warmer and had bass bloom. No one complained. We loved the sound and having just been gifted a working Pioneer SX-780, I was reminded of how much I missed that type of sound.