So, I was creating the game of "Battle of the Counties", planned to multiply the bonuses of every normal bonus by 5 and castles by 10, but the Medieval England map has tonnes of bonuses, and customising bonus values is sheer pain. You have to do it manually, one at a time, for nearly a hundred bonuses, and I tosses my hands into the air and just let it be. Please, simplify the process, and don't let multiplying the bonuses pain and only pain.
You can also use mods to overwrite all bonus values at once.
Unfortunately, both the API and mods require a membership to work, but if you post the template link in here, one of us should be able to use the mod to change the bonus values and save it as a new template you can use.