Hi Matt,
I really don't think there's much wrong with the PP - and the background could be a lot worse too.
If anything; they present with a blown red channel, perhaps the loss of detail is what you are missing?
That might have happened in PP, or it might be as shot, just not recovered when editing (I presume) the RAW file, or maybe it was seriously blown, I can't tell.
However, they are still way better than average, so take heart from that.
I am not going to offer to edit (even though I'm not a pro) because I doubt they'll improve that much (at least with my skills)
... and well done for getting down low too.
Cheers,