It's become somewhat of a staple of post-9/11 TV and film to include large numbers of casualties. But going way back, TOS had insanely huge numbers casualties, although it always happened off-screen. In Wrath of Khan, Khan tortured and murdered the Regula staff and probably the Reliant crew as well, but of course we don't see it. Now it's all more immediate.
And I'd say the Enterprise was utterly incapable of doing anything but "sit there" when the Vengeance flew past. It took a whole year to repair her. What could they have done?