I admire you for your patience to wait for the movie, I can't, I do spoilers to myself or I read the manga haha 😂 like you do, it's more enjoyable because you don't know what's going to happen and you're surprised with every scene.
Making anime about sports is a difficult task, you have to know a lot about the sport itself and animating it is a challenge with those movements, I'm glad Haikyu is still maintaining that level of professionalism 👌
Patience is a virtue haha. Yes, it was a long wait, but it was worth it.
Certainly sports anime are a big challenge as it can be complicated to fluidly animate the movements of the players, but in Haikyū!!! this is not a problem, they have made it spectacular from the first moment.