I'm yet to try metocin so this idea is coming from inexperience in that specific area, but looking at this now - what if the substance is merely "shy", a bit like how it is said of ska pastora/Salvia divinorum? This is obviously a kind of metaphorical language that I'm using with respect to understanding psychedelic states, and that's not altogether uncommon when looking at how understanding of the spaces gets articulated in traditional use.
Does metocin have its own language that we're yet to decipher? Are we still in the process of developing its psycholinguistic morphogenetic field, or whatever, on account of the relative novelty and rarity of this substance?
Does this 'richness' extend to the sense of inner dialogue? If so, why would both psilocin and miprocin have it, and yet metocin not? And have you tried double-blind testing to ensure that it's not simply an effect of your expectations? Maybe it stems from, say, how you happened to be feeling or whatever was going on at the time you first tried metocin. Could it be that you yourself were lacking in an aspect of inner communication and you now have some conditioning that continues to mould your expectations?
Having a side-by-side comparison from as many psychonauts as possible (from a thorough mining of the Erowid vaults, for example) should help throw some more light on this particular set of questions. It just seems particularly fascinating that this one homologue in between two rich and delightful siblings should lack this one feature - a bit like the 'middle child' conundrum (being one of my numerous excuses for having been the wayward black sheep of the family

)
In light of all that, I'd jump at the opportunity to compare these two psilocin analogues should it ever arise, if only to see if there's a special 'middle child' affinity that I can work with!