It is notable that though Adi Sankara is familiar with the concept earlier explicated, in the Buddhist context, by Vasubandhu- for example in Verse7 of the Annapurnashtakam- he makes no use of it similar to that of the Great Sheikh.
I suppose, antarabhava's intermediate position between Thantos & Eros- the 'maranabhava' experience of Death and the 'upapatibhava' revival of Erotic appetency- thus defining itself as pure disembodied craving- trishna for saguna Krishna- already signifies 'meaning creation's' poetic certitude of Maternally sublated viyogini yoga, yielding the surety of alms.
Thus my own instinct is to go no further but just stop here and simply link meta-metaphoricity, via artha-alamkara (poetic conceits) like vyagatha- where the effect or object achieved is undone by its own cause- or the 'inverted simile' of vyatirekha- where the lower usurps the place of the higher- to the vyatiharadhikaranam counselled by Brahma Sutra 3.3.37.
व्यतिहारो विशिंषन्ति हीतरवत्
I wonder whether the fact that the great Advaitic scholars operated under the sufferance or patronage of Royal lineages tracing their way back to Bharadwaja by way of Ashwathama meant that the Gita's 'upside down banyan' (Ashvathama) which Krishna counsels us to cut-down had the slesha property of theosis by vyatirekha such that the ritualist's methexis was sublated.
A little thought will show that the property Salman H.Bashier claims for barzakh- viz. being a 'limit' which unites what it divides- cashes out, simply as a vyagatha based vyatirekha within the shloka- i.e. meta-metamorphocity is ontologically empty- surely a good thing.
The pure nominalism of Shingon or Tulsi still lay in the future- i.e at the source- so that too is all right and tickety boo.
The other way to go- viz. following Ramanujan and letting Darpan act as the 'limit', has an attraction in terms of squaring with Adi Vigyan as throwing your evils onto your reflection in the mirror- aint so bad either not being Ontologically inflationist and giving room for such fuckwits as we will always have with us coz as Pascal said there will always be more monks than Reason.