Ugly and, while I think it's pretty stupid to put the bridge sticking up out of the very center of the saucer section like a bullseye on the world's biggest dart board, imagine an Olympic class ship getting attacked. Any frontal assault would kill half the crew.
If they put the resilience and redundancy of inertial dampeners into everything else Starfleet, any encounters with hostiles would be over in seconds, even the first Borg. It's as if Starfleet ships are built with dice rolls and a stat sheet, and they dump everything into keeping the gravity working with all other stats below par.