Spontaneity is fine as a name in the context that suddenly a spell can be cast. Not even sure how you could attempt to apply Soliloquy to it in its stead as its definition and theatrical application would, by default, make it better themed for BRD or PUP. In general, I still think the JA's kinda meh, at best used for possible double MBs or now that we'll be getting R2, the ability to raise 2 people after a wipe at a decent pace and 3 if you cast R1 too.