The Hot Plate has many great features, one of which is a compensatory EQ for playing at low volumes. I have compared my head at low volumes verses running the amp at a higher volume with attenuation. I prefer the tone with the amp attenuated a bit at home.
To dial in a tone at home you should defeat the EQ on the Hot Plate, tho.
If you plan on keeping the Hot Plate in your signal chain, then you can definitely use it to dial in your tone. I don't use mine live, so I have to make minor adjustments depending on the room and what volume I'm playing at.