I do think it was an... extremely strange choice to reveal Basphomy as one of the first 3e character sketches (possibly the first?) so soon after that giant Let's Not Have Bikini Witches thread the devs started.
To be totally honest, I think if anything the problem with Basphomy isn't the part were she's half-naked, but where her conceptual underpinnings are the
laziest possible shorthand. Outside of pinup fantasy art circles, whole or partial female nudity is not inherently visually indicative of "lavish personal decadence" unless you are applying puritanical standards of 'nudity is undignified', 'moral degeneration means 24/7 wicked sick orgies', and the 'mounds of dehumanized slave girls' motif, because rarely is the one
presiding over said decadence the half-naked one when it is all intended as a show of wealth and overt social power over others.
To play up "decadence" for a greedy and conquering Dawn equivalent, you want to display
Spectacle and Excess of the demon realm in both presentation and dress, not
less. If her skin is toughened like armor, then she wears
more armor because she
can, and you are not worthy enough to see or test her flesh firsthand. It should be the most elaborately fashionable and expensive she can find, the kind where every link in her mail shirt is a conquered mortal soul, hammered to shape on Alvuela's anvil and etched with Ligier's green fire, and silks it is draped in are wrought from their voices by Berengiere so each is beguiled to whisper of her past glories and cunning for all eternity.
She should array herself not with jewels and metals of the crude earth, but yassal crystals by the dozen, every one containing a member of her sprawling retinue for entertainment or service, lounging on a throne of living furs culled from the immortal beasts who carry her atop a palanquin across their flayed backs as a warning to all who witness her. You want her constantly flanked to either side with blood ape attendants hunched under tall racks of fearsome and ensouled Malfean blades pledged to her service like officers, because she has had her pick of them, but in battle she is more likely to order a limb torn free from a loyal tomescu to wield for the purpose instead, having been taught to be equally capable of killing with either.
Less is not more,
more is more!