I expected the big fight to be a bit ..bigger. I just didn't feel like there was enough monsters attacking. They kept showing there was a lot but all they did was stand there in the background filling up space. It's always just a handful attacking. I also imagined that there would've been more dragon knights and Slyph forces. The final fight scene felt more anticlimatic to me compared to the last couple episodes.
The novel eloquently drew an image of massive whiteness against almost a single black dot (Kirito). Also his attack to break through was alot more spectacular in the novel as it wasn't some cheap move where he puts both blades on top of each other and just plow through everything. He was using dual blades in super speed cutting thru the whole blank of white mobs like a boss. It shows me that there didn't seem to be a whole lot of budget left for this episode.