I just tried to use the Arpeggiator feature for guitar, and to say the least, it was rather ambiguous. Three suggestions I have to update it would be the following:
1.) Divide them into different genre's and/or styles so choosing the presets are a little easier.
2.) Make them somehow convertible to MIDI so they're available to see in the Piano Roll, which would aide even more in picking the presets.
3.) Make at least 3 5 min. video tutorials that show how to use them in detail.
Thanks,
KC