Re: Insurrection as an episode...
Exactly. Under ideal conditions (and yes, the conditions in INS were not ideal), if Our Heroes primary concern was the Prime Directive (and that's a big if under the circumstances) they would have stood (standed?) down and withdrawn from the planet as soon as they became aware of the relationship between the Son'a and the Baku, for the same reasons they withdrew from Klingon space in "Redemption".
It was the best of Trek, it was the worst of Trek...
"If I lean over, I leave myself open to wedgies, wet willies, or even the dreaded Rear Admiral!"