Re: Better if they had allowed main cast to die?
Well, DS9 itself was on the safe side of the lines after the Occupation Arc and was close enough to Bajor that they could probably have essentials brought in as-needed. When they didn't we had episodes like "Empok Nor" or "The Siege of AR-558", though granted the second one didn't primarily involve Our Heroes.
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!"