Irony is more important to storytelling than you might think. It helps create more poignant story events and ushers in more meaningful character transformation.
Character arc (aka the internal plot) is essential for a satisfying story structure. You might have tension on every page and you might follow what you think is a winning structure, but if you don’t have a character arc, your story will fail to resonate with readers. Learn the key concepts for character arcs here.
Storytelling is a complex beast. There are lots of things that appeal to readers: poetic sentences, imaginative alternate realities, sympathetic and/or courageous characters, relatable problems, vicarious experience. But at the scene level, there is really just one simple concept that spurs the reader onward.