Yeah, I'm mostly a "gut-feeling" kind of FFLer myself. It seems like the seasons where I do the most homework, I wind up going down in flames, but if I just wing it and rely on my knowledge of the league, I wind up fielding a contender.
For me, the law of diminishing returns is a formidable deterrent to investing too much time, energy or money in additional research. Plus, the frustration factor increases proportionately to the amount of time and effort I expend studying stat sheets.
I'm not saying FFL research is pointless; I'm just saying I get more enjoyment out of playing the game when I free my mind and follow my intuition.
One of my old college buddies had a favorite saying he used to hector me when we played chess: "Think long, think wrong!"
...and all too often, he was right on the money!