If LR cartos were leaving to strong a TH then try a few different resistance cartos. 2.5, 3.0 3.5. One will come close to hitting your sweet spot. No need to get a 5 pack if they're to strong for you.
Flavors of juice are a very personal preference so try a few samples from different vendors to see what you like before putting down money for larger bottles.
Yeah, I think I have a very sensitive throat, sometimes I stop vaping after 4-5 puffs not because I'm done but because I can't stop coughing...
However, after struggling through the new strong juice I now find the old mellow liquid quite less satisfying... Hmm...