I think you're on to something, jseah, and I think its worth a lot! You bring the engineer in me out here with those pictures. The wick holes are HUGE in the Triton coils compared even to my nautilus mini, are there two or four of them? My nautilus mini coils are 1.2 ohm cotton and have four smaller holes (still to big or too many imho) that look to be about the size of the wick holes in the Vaporshark coils. Absolutely no doubt in my mind that the Vaporshark coils will perform better than the stock coils with higher PG in the mix, and your experience tends to prove that out. You should consider sharing your information and pics in theTriton thread I linked to abuve, or give them a link back to here, you would be doing those guys a favor.
One other thing I noticed in your pictures, the 1.8 ohm coil has a narrower throat channel and smaller holes in the bottom pin for drawing in the air from outside, that means that as you take a draw the restriction is higher and will tend to pull more liquid into the wick holes, making this coil an even worse design for higher PG fluids. No wonder they have issues with the stock coils.
Another thing I have found that ambient temperature has a significant effect on VG viscosity, and PG as well (to a somewhat lesser degree), the viscosity vs. temp charts I looked at showed VG viscosity decreasing by about half with only a 10 deg C temperature change, thats a big change, and explains why when I was outside vaping earlier in the warm air, why my new GS Air tank (for TC, but i use regular coils) started gurgling even with high VG (I think its 50/50 at least, likely higher VG), I had the new cotton 1.2 ohm vertical coils in it, it has two wider wick slots and cotton, while my older style GS Air tank with the dual 1.5 ohm coils (4 narrow slots) had no issues (it was not that hot today) with 70/30 PG/VG. I came back in the house, cleaned the GS Air tank of excess fluid in the top, and its behaving quite well in the cooler room. My nautilus mini has 1.2 ohm cotton coils with four wick holes, and it gurgles even more in high temperatures.
Edit: I see that you already had shared your success with the Vaporshark coils with the folks in the Triton thread, jseah, good for you!