Oddly I've never considered my Triton to be a direct lung tank. It's a fabulous MtL tank, at least using the 1.8ohm coils.I tried Lannie's iSub tanks. I tried a Herecles and a Triton (and gave them to Lannie immediately). Sorry... don't like 'em at all. Anything I have tried to do direct lung hits with, I get no flavor. I am sure that is just my tongue yelling, "Hey! Hold that stuff here long enough for these antique buds to sense it!" When I do MTL, however, the process is about 6-10 seconds (the fire button being ON only for half that) and my tongue is happy that way. One or 1.5 second hits do absolutely nothing for me. Oh well...
My original view on direct lung hitting was similar to yours, too short and fast, I needed the longer more drawn out hits from MtL. Then I tried a setup that forced me to direct lung, and after a few hits figured out how to do it "the right way." The quotes there mean the right way for me, not necessarily saying for everybody. Anyway, once I figured it out, I am taking longer hits. Maybe not as long as with my MtL stuff, but more than just a couple seconds. That was the turning point for me, now I do enjoy it, though I'm still vaping my MtL stuff more than my direct lung stuff.
Not saying you should change anything. You like what you got, no reason to chase after something different. Just letting you know that my experience was I'd tried it before and didn't like it and figured I never would. But that was because I hadn't learned how to DL in the way that worked for me.

