Major studios haven't made excellent content for a while, so them acquiring WB doesn't matter much. If you want to see the "excellent" films (i.e. I'm assuming you mean well-directed, well-written, well-acted, meaningful, etc.), watch film festivals. They have lots of fantastic stuff, and their movies are getting easier to access.

We've lost nothing with WB except more Joker: Foile a Deux and Wonka garbage.