You know its really not that hard to get poetics, roulettes and hunts give poetics, and I tend to have more poetics than eso without even trying. Also your logic is flawed in that overflow would convert to poetics, because that would add more currency into the world rather than being a 1:1 conversion.

I wouldnt mind a system where you can trade eso for poetics 1:1 though, that would solve your issue without there being much problem.