I was surprised they used the manga version for Zeff losing his leg.
Orange Town was good, but it missed Zoro slipping on the hill (so funny in the anime, for me at least. They cut out all of Zoro's comedic stuff) and Luffy getting angry about Kuro hurting his own crew was more impactful in the anime, since you actually get to see Luffy's anger building. But yeh they had limited time, so they did well.
Not reach Arlong Park yet, but I've read about it and changing how the Bellemere stuff went down seems pointless, since it didn't save any time - same for the village not knowing that Nami was collecting the money. I also didn't like how they meet Arlong at Baratie, rather than just at Arlong Park. They did the "which one is Arlong?" thing, but it's nowhere near the same as doing after Luffy and the crew are aware of Nami's situation.