IMO, the issue isn't the FTT. The issue ties back to inherent broken system trading is.
I will never stop saying it, the reason the old rares list worked vs the new ones is this:
Each main tier (Advent/September/Main) worked because they were split into numerous subtiers with a minor difference of value between each tier. This allowed for easier recognition of value compared to what we have now, with hundreds of pets in the same 'tier'.
This is a really good place to incorporate demand into the lists. Just because something is OMGSR does not put it on equal footing to say, a Black Advent. I do not understand the refusal to incorporate demand into lists, because its already frustrating having a list where the list is made irrelevant due to demand.