fewer trusses(more flavor?)

More trusses more toms, I think............flavour comes from your soil and feeding, and obviously the variety
Don't over water as you can dilute flavour.
In an ideal world I think animal manures produce better flavour than chemical tomato feed, but that's just my opinion

I stop two plants at three trusses and two at four and the rest at five.  It is nothing to do with flavour, it just brings the crop on sooner. I have been picking tomatoes now for two weeks from the plants that have been stopped.