Meeting with J.C.

What does Nietzsche say about his own style?
Is Nietzsche aware of the change in style himself, or is it just something we perceive? 
Can we observe a parallel between his change in ideas and change in style? 
For instance, the death of God in the Gay Science?
Is this paper going to be more about Nietzsche's times (changes in technology, intellectual climate)? Or about Nietzsche himself (change in ideas between perceived early and later style)?
Or both?
"The owl of Minerva spreads its wings at dusk," Hegel, 1820: read the beginning in light of the end.
Nietzsche's decision not to create a numeric distinction between the sections in Beyond Good and Evil but to create new sections which continue with the numbers from previous sections (maxims, etc.)
- Beyond Good and Evil
- Gay Science
- Untimely Meditations (Use and Disuse of Human Life)
Would looking at unpublished material of his lifetime (something he was not necessarily satisfied without) interesting?
Or would it be creating a genealogy?