Hi @mackid1993,
When you experience battery drain while ARC is idle, is the app a) still foregrounded, even if the phone is locked and b) resting on either the Queue or Now Playing pages?
Development has a ticket in for a high-GPU draw bug when the app sits idle on those pages. This is possibly a variable in your reports.
To test, on the most recent build: can you reproduce any battery drain if you a) background ARC and b) rest on an Album or Browser page?