I'm towing a 26TBSS with a 2015 Ram 1500 Hemi with e2 hitch. No issues with sway, but still need to dial in the WD a bit. Don't trust the dealer to set it up properly. When I got mine home, I could pull off the bars by hand without touching the tongue jack... Guess they set it up expecting my Ram to squat real bad. The trailer just leveled it, my sig pic is basically at the dealer with no WD.
I'm running the factory rear springs with Monroe Load Adjusting Shocks. Seems to tow fine and handles the 900+ lb tongue weight on my unit, but I'm always looking to mod and improve (even if I owned a 3500 haha). Please post about your springs once installed. Did you go with Tuftruck units?
EDIT: Just noticed your in Houston, I'm in Conroe. Bought mine from Camperland up here 3 weeks ago.