Can anyone help me tighten up wording for Musical Form and Mystic Instrumentation?

I mean, if there is a way that I can possibly just say "you turn into an Unseen Servant, but can do X, Y, and Z extra things that has this many hit points", I will take it in a heartbeat.

And I kind of need help making talking into a cantrip. Later class features will make them better, like removing Language-Dependent from Speech, or having Glorious Noise replace any and all sounds that your body makes (basically, Perform in place of Move Silently). I'm kind of considering adding Lullaby to the list of cantrips that you can automatically use.

There will be some later additions to their "spell list", enhancements to Musical Form, and the like.