I think that's the key. At face value, how you described it, sure, I could see a system like that working. But it sounds like you're feeling "meh" about it.
I'd say, start journaling out how you feel about the mix. Ask questions, describe your frustrations and insecurities, etc.
That's my answer from the writing process angle.
Now the actual plot content angle...
In the discovery phase, I find my brain pulls in all kinds of threads from all over. There are so many things that can relate to so many other things. The key is figure out which one is the absolute ruler over all the others. This is the thread which you simply can't imagine taking out.
Once you've identified that, you can start bringing back other threads one by one, keeping only the ones that "pay their rent on the page" (i.e. contribute to 1) the external plot, 2) MC's interior emotional journey, or both).
How's that for platitudes?
Hope it's helpful though. Paring down the conceptual/thematic landscape is really hard. Don't give up!