Well I finally got the DP+C [HDC] QCF+C loop down (at least on P1 side, having trouble on the P2 side) and yeah, it is much better.
Hell, just my former st.C, f.B [HD] st.C, f.B xx QCF+C [HD] QCF+A [HD] (QCF+C, HCB+P [HDC] QCF+A) x2 [HDC] QCF+C, HCB+P [HDC] QCFx2+P, did 528 damage.
Now just st.C, f.B [HD] st.C xx (DP+C [HDC] QCF+C) x4 [HDC] DP+C did 539 Damage.
Replace the last DP with Final Showdown and you get 589. Replace with NeoMax, 719.
So yeah, to my delight and dismay, there's honestly no reason to learn that rekka loop other than to give yourself headaches lol. Now to work on my damn P2 side execution.