I'm not sure what the max volts on that battery is, but 2.8 is a pretty high resistance head. I'd go with the 1.8 or 2.4 personally, as you can achieve a better vape with the voltage available. You can buy cheap 3 packs of 1.8 heads at alot of vendors, or look into rebuilding the head yourself eventually. (Edit - Don't rebuild your own heads unless you have a device which can read ohms like the Provari or Vamo, or unless you buy an ohm reader. It is dangerous to throw a head onto a device without knowing the ohms.)
I assume the flavor loss is a combination of the gunk buildup from not cleaning it and maybe not having proper voltage for your 2.8head (which should be 5.4-5.8, a number which my Vision VV Spinner cannot achieve).