ok I think I understand what you are saying.
The sentiment, if the price was stable, would likely change for the better (less panic dumps, and dragon chasing pumps), but we are still applying the trades with the worst case sentiment.
So, if we are stabilizing with the worst case sentiment, that sentiment is now irrational compared to the price, and it's harder to stabilize a price when the trades are being made irrationally. That then should imply that the model is able to handle very extreme situations.
if there were more stability in bitcoin within your exchange.. then there would be less people playing with them in your exchange as a day trading platform
although a usable currency stability outside of exchanges is good. but on exchange stability/stagnancy of prices are not good. it would effect peoples decision to hoard large sums on exchanges because there is no need to daytrade.(altering your supply buffer)
thus even in a stable exchange. your supply buffer would not be the same. and because there is lack of supply. people can abuse that. by arbitraging. and only using your exchange as a temporary 'flip' rather than a permanent store
in short. the results you released would not be the same. you cannot predict the reactions of change. your theory will fall flat on an open market. because you can never code sentiment accurately.
you would need to be the only wallet service and only exchange available to be able to control 'sentiment'..
however ill say it again, your altcoin could be useful if you aimed your theories not at the bitcoin free market. but at the fiat/altcoin centralised markets. and tried engaging your discussions in that economy. as the results (which still wont be perfect) would however have less variables to attempt to simulate.
again you would have more success and possible fame. if you aimed your PR at a centralised solution for currency economics