BD - that was/is epic and sounds professional! The style and vocal reminded me of an Aussie artist - Delta Goodrem.
Excellent arranging and production, and change in dynamics in the song.

As for your AI and Showcase questions, you say you are using 3 BIAB tracks, so that satisfies the guidelines from my reading - they say to indicate which tracks you used and which are your own. I think as long as you meet the BIAB content and are transparent about other sources, that should be okay?

One thing I would like to see more of in the Showcase is examples of how the song originated in BIAB and what it became after production. I would think some songs would be very close to their origins, while others would illustrate how they morphed through production - not saying one is better than the other - just showing how BIAB was used in the initial writing and inspiration.

Anyway, this was a great final result on your part!

Andrew