As long Somali’s agreed to solve the Somaliland debacle, I don’t think anyone would consider having an Ethiopian naval base in the region and Ethiopia knows that.
Keep in mind that Ethiopia hasted this initiative and deal immediately after hearing of the Djibouti meeting and agreement to restart the talks between Somalia and Somaliland, and rapidly organised for Muse to come to Addis Abeba to sign the deal. Ethiopians are smart and up to date, and perhaps even understand Somali’s current state and trajectory better than we understand ourselves, as we tend to be blinded by clan dynamics and distracted by clan based politics we loose track of real politics.