Sound quality of Telltale games is, since the middle of ToMI, ok. No need to be better at all.
However, about the soundtrack, I agree about ToMI’s one not being so great. Sam&Max was a lot more interesting. I was disappointed of this part, because when I hear Sam&Max’s soundtrack and of course CoMI, I was hoping for something a lot more «*natural*». It’s plain synthetic and perfect in this one, there’s an evident lack of sensitive approach. However, it’s not that terrible. It’s just… ok, but next time, it could use some more texture in the sound, some more real instruments, more freedom.
I don’t think LA will do any adventure game except reediting Lechuck’s Revenge. And it’s okay, TellTale is a dynamic company and they’re in constant progress