sounds like you ladies need protein! you have mentioned that your hair is coarse, but i wonder if it really is coarse. have you had your properties tested? anyways what you are describing sounds like overconditioning. maybe start with a little protein, and if you tolerate it, then gradually increase the dosage.
2b/c wavy modified CG since July 2012
medium texture, normal porosity, normal elasticity
hair likes protein, doesn't like oils, easily OC'd

low poo: JCHCC, CJGCS
RO/co-wash/LI: YTCarrots, DB Pumpkin Seed
stylers: a bunch of stylers that are all pretty much the same (KCCC, UFDCM, CRCM, CKCJ) or ArcAngel if I need more hold