DJ Mustard and Ty Dolla $ign are a natural pairing, but there is a limit on much Mustard can contribute to a Ty Dolla project. Admittedly, he produced "Paranoid" & "Or Nah," the two biggest hits on Beach House EP. He's produced two of the Free TC singles to come out so far, and it's a split decision. "Only Right" was forgettable and "Saved" has club smash written all over it.
His other singles have yielded quality results -- "When I See Ya" marries pop/Mustard-esque sensibilities with a thick, soulful, jazzy chord progression. It's produced by Cardo and Johnny Juliano, and indeed it's not so far from The Game's "100," which they also produced. "Blasé," produced by Cardo, is an infectious trap banger that is the audible manifestation of what it feels like when you walk in the club.
Basically, Ty needs his pop, soul, and trap influences in his production to tease out his different sides. And he should also bring back that violinist who went in on Beach House EP's "Work" and "Never Was the Same."