I would like to suggest the addition of an inverse of the current experience cost function by including configuration options for minimumXPCost, maximumXPCost, and blocksPerXPLevel that scales higher the shorter the distance (or scales lower the further the distance). This mechanic would be helpful for promoting alternative means of short distance travel, such as minecarts or horseback, but allow for more convenient travel over great distances where other methods would be relatively impractical.
I hope you take this suggestion into consideration. Thanks for taking the time to make and maintain this quality mod.