"If the node group utilisation is 5%, and taint_upper_capacity_threshold_percent is configured as 10, Escalator will taint nodes at the rate defined in fast_node_removal_rate"
should be
"If the node group utilisation is 5%, and taint_lower_capacity_threshold_percent is configured as 10, Escalator will taint nodes at the rate defined in fast_node_removal_rate"
https://github.com/atlassian/escalator/blob/master/docs/configuration/nodegroup.md#taint_lower_capacity_threshold_percent
"If the node group utilisation is 5%, and taint_upper_capacity_threshold_percent is configured as 10, Escalator will taint nodes at the rate defined in fast_node_removal_rate"
should be
"If the node group utilisation is 5%, and taint_lower_capacity_threshold_percent is configured as 10, Escalator will taint nodes at the rate defined in fast_node_removal_rate"
ps. Thanks for providing this as open source.