I do also whish there should be an option to change the ip addres in esphome integration in homeassistant!
Due to the nature of the original desgin (mDNS) most people running esphome on the same subnet as homeassistant have no issue with ip address changes though…
Me, running esphome devices on a separate ssid and disabling mdns… I whish it was possible to change ip addresses without the hassle of deleting integrations and re-adding them.