Even in supposedly dark DS9 the characters were emotional Gumbys, just like TOS.
Ziyal is cruelly murdered? Thats okay, lets have a Klingon wedding with plenty of hijinx! Odo helped the enemy? whatever, we forgive him and reinstate him as chief of security. Sisko advises the Bajorans against the interests of the Federation? Starfleet doesnt even notice. There's a terrible war going on, and the future of the Federation nags in the balance? That doesn't stop the station's officers from becoming obsessed with a holosuite baseball tournament.