Based on the config tooltip, I think there may be a bug in the implementation of the elytra's speed boost, because setting it to 0.0 (the default) still adds a boost. I changed it to be a multiplier, and updated the default from 0.0 to 1.0 so that the default behavior remains the same.
I also added a config option to disable the Speed Boost enchantment for elytra entirely, as some users expressed that it renders most other modes of transport obsolete, without an easy way to add drawbacks for balance.
…isable entirely
Based on the config tooltip, I think there may be a bug in the implementation of the elytra's speed boost, because setting it to 0.0 (the default) still adds a boost. I changed it to be a multiplier, and updated the default from 0.0 to 1.0 so that the default behavior remains the same.
I also added a config option to disable the Speed Boost enchantment for elytra entirely, as some users expressed that it renders most other modes of transport obsolete, without an easy way to add drawbacks for balance.