I'd point at the sorbitol too, not just the glycerin as a possible dryness causer. Sorbitol is both a nonionic surfactant and a humectant, and there's even more of it than there is glycerin in LALSG. Maybe try layering some AIF under the LALSG as sort of a buffer? You'd still get the hold of LALSG but there'd be another layer of gel between it and your hair that would hopefully help prevent dryness. Or, if your hair likes a bit of oil, try sealing between your LI and the LALSG.
CG since 11/2011
2c /3a F /Mii, low porosity

Winter Products /Routine:
Clarifying: Herbal Essences Tealightfully Clean
Low Poo: Renpure Luxurious Argan Oil
Co-washes: Suave Naturals Tropical Coconut or Daily Clarifying
RO:
Tresemme Expert Selection Perfectly (un)Done, Cure Care, Suave Tropical Coconut or Daily Clarifying
LI (if needed):
Tresemme Perfectly (un)Done, Renpure Brazilian Keratin Straightening (old formula), Cure Care
Stylers: HETT, AIF
PT: IAGirl's as needed