Just a reminder that if the BTC or BCH price increases, so do the fees by the same multiplier. $5 fees at 5,000 become $50 at $50,000. .3 cents only turns into 30 cents at the same rate.
I don't know if we can easily lower that limit. Because if you have to update your node to lower that limit then not everyone will do it and .1 sats/b will propagate less easily than 1