With appearances by Lady Gaga, Bun B, Gucci Mane, Marsha Ambrosius, Chrisette Michele, Jazmine Sullivan and K’Naan and production handled by heavyweights Mark Ronson, the Neptunes, Cool & Dre, 9th Wonder and TV on The Radio’s Dave Sitek, expectations are high. And it’s cool for a debut, but there’s plenty of potential for so much more here.