can we pls have an option for blocks within gyms to only be able to be destroyed/placed in creative, as it is the only way gyms seem to work (i've not tried this) would be in Adventure gamemode. i know this can be done by adding other mods and plugins but it seems a slightly ridiculous solution to expect to use other mods when playing as standard.
also maybe have a way to distinguish if previous bosses have been successfully defeated so situations like dropping in directly onto the top of the air gym to defeat final boss without progression isn't possible.