I think elevating the bass will not necessarily lose detail, but put them further back than when the bass was lower. It’s a little bit of give and take. The details in say the mids and treble may still be there but now they arent put as far forward since the bass just got elevated, so you don’t hear them as clearly.
Pads can definitely change detail quality and quantity though. I’ve found the Elegia to be very sensitive to pad rolling. Some headphones are less sensitive, but the Focal series has been pretty sensitive to it.