Re: Picard was right, Sisko was in the wrong..
Do we know if there was a decent amount of time between the fleet coming together and then the battle itself? I ask because even 30 or 45 minutes prior to battle should be enough to round up all the civilians into a ship (you have 40 of them, you can spare one -- and indeed, one did survive) and head for a starbase while the others do battle.
Yeah, there's a tinge of 20/20 hindsight in there, but Starfleet was expecting a big battle in any sense.
"A life is like a garden. Perfect moments can be had, but not preserved, except in memory. LLAP" -- Leonard Nimoy