Concerning the 3 remaining masteries, it was revealed during the September 14th Multiplayer Dev Q&A with Zizaran stream that they’d all be released with 1.0.
Then during the October 21, 2022 Dev Stream Mike mentioned that the Runemaster & Warlock were still in early development, specifically stating they were in the design/concepting phase. It’s probably not a stretch to assume that the Falconer is in the same stage of development.