I suppose it'd make sense to end the season with the climatic fight with Deku & Bakugou Vs. All Might, it's a bit more dramatic that way.
Also, it occurred to me that one of the cool things about this series is that it's basically a scenario of a positive end conclusion of the X-Men. 'Mutants' are initially feared and considered non-human, but eventually they're accepted into society and considered normal people, and those who use their powers for good are held in high esteem. Sure, things aren't perfect, but for all intents and purposes, it's Charles Xavier's dream having become reality, and that's awesome.