The Jem'Hadar ship ploughed pretty deeply into the Odyssey plus hit the deflector dish. If the deflector on the Sovereign-Class is a standard design, then the Odyssey's would have been charged with anti-protons as well.
Besides the Dominion had to destroy a Galaxy-Class, to show just what level of threat they posed.
Besides the Dominion had to destroy a Galaxy-Class, to show just what level of threat they posed.