I understand that in your view the farther away from perfect peg (no spread) the sell/buy spread is the less real liquidity it produces. That is why a higher spread liquidity would be in a lower Tier. I think it would sense.
We should encourage lpcs to adjust their spread and let them know that they are likely to get less rewards in case they put a large spread. Right now, it seems it is not clear at all if you can easily modify the spread in the config file.
Then the market should find a balance in which most of the liquidity should be concentrated on a compromise: decent reward for a tolerable volatility risk.
I do believe tha the current spread 0.2% (it seems in most cases?) is too small.
Even in forex, when you change from usd to jpy you pay more like 1%.
In fact i think traders should have no problems paying more than 0.2%.
Stable crypto is not a normal crypto. This should justify a higher trade commission, not charged by the exchange but by the lpc.
Edit: of course, right now traders would rather hedge with usd in case the spread is too strong but once nbt is spread accross several exchanges hedging with nbt should be more advantageous. Furthermore right now nbt has a strong lead on other pegged crypto. So nothing prevents us from imposing a standard rate at this stage.