https://www.cnet.com/news/star-trek-discovery-season-2-discovers-a-new-sense-of-adventure/

In season 1, Starfleet officer Michael Burnham played a role in igniting a war with the Klingons, fell in love with a traumatized soldier and wound up in an evil alternative universe. Dealing with heavyweight themes like war, politics, torture and betrayal, this first season was gritty and impactful. But as compelling as it was, it wasn't the cheeriest run for Burnham or for audiences.

Then season 1 climaxed with Burnham declaring "We are Starfleet." And the arrival of the Enterprise at the cusp of season 2 signals a return to a more familiar vision -- more positive, more colorful, more Star Trek.