I have done both IM and Subq on Prop and found your theory to hold true on subq slowing down the prop train. The downside is that your overnight trough may not go as low on subq as IM. @readalot has talked about subq having lower peaks with higher troughs (i.e., less fluctuation)Have you tried injecting Test P at night? Were you doing IM or subQ?
Injecting at night would likely make your sleep worse.