The term power trio can have connotations. You might think of 70s bands, like Cream or Mountain. Guys with long hair jamming out on songs, soloing over each other until the song no longer exists. Handsome Jack, however, is a power trio of guys with long hair, that respect the song. There's plenty of guitar and drums on Everything's Gonna Be Alright, but it's all rooted in keeping the groove going, rather than band members playing all over each other.