I wish there was a way to edit the pitch bends
Yep, the lack of a pitch editor is really depressing but I have my hopes that it can improve since it is still in beta and Microsoft is accepting feature and ideas (smiley face in the title bar).
The PDF files basically just cover setup, the purpose of the vocal flavor thingies, making tracks, exporting, and keyboard shortcuts - nothing groundbreaking or tricky to grasp. There's also Ventilation and Pause, which I need to mess with more... the PDFs kinda gloss over them, so I can't say too much about them yet, but they seem to function similarly to Vocaloid's Velocity parameter. It's also noted that you can't adjust the position of any accompaniment you import, so you'll have to adjust it before importing it or just build your midi around it.
Ah, so I basically figured out the software by clicking around lol. I guess it was as simple to use as I thought it would be and maybe that was what they wanted when they released this synth.

I believe the first 2 options refer to the ventilation/pause parameters they were speaking of. I'm still having issues rendering (keep getting "server is busy, please try again later") so it's a pain so I'm just going off what I heard the first few times it did work and extrapolate from there. There is an option in the fifth dropdown menu, first option that seems to deal with the automatic application of parameters?
The first option makes a 'V', which puts breathes wherever you apply it which is nice for the beginning of phrases, as well as in between long phrases to give the appearance of breathing lol. The second option makes an 'O' tag, which I'm guessing is for pauses mid-phrase? Perhaps glottal stops or just stops instead of smooth singing?
The third option is just the normal note.
The one thing is the choice between setting lyrics from this note forward, or setting lyrics for the whole track (the fourth and fifth respectively). There isn't an option to add lyrics for a selection of notes but that can change as well if they deem it necessary.