I do get confused by the "Tom King's Batman is incompetent" thing, because the way he took out Bane - both resetting his own back, and then headbutting Bane, are really ridiculously overpowered moves.
The Flash thing, to me, was an example of Selina vs. Ivy's puppets, rather than Selina vs. Flash. It made sense to me. But I'm not a Flash reader, so I don't really have that perspective.
As for the Meow - I'm still holding out hope that Selina's going to be an incarnation of a Cat or something. Or got bitten by a radioactive cat!
Interesting! I'm actually more hooked by King's beginnings and parallel sections. Which of King's other endings do you find really effective? I'd say Selina's answer to the proposal was my favorite, even if I'm torn with the actual end to War of Jokes and Riddles.