Board Thread:Misc./@comment-26875950-20150810164018/@comment-25232661-20150811120733

His skills with the gear have probably dropped a little since graduation due to lack of practice, I would think. It's been three months, but the only time we've seen him use his gear since Trost was when he killed one Titan at Utgard. I can imagine Levi had him practice before the 57th expedition, but he was also working with Hange then, and over the timeskip between chapters 69 and 70, I feel like Hange has had him focusing only on his hardening ability. He's probably gotten a very minimal amount of practice with his gear at best.

Remember, Eren didn't have any natural skill with the gear like Mikasa or Jean. He had to put even more hard work and determination into it, so without practice his skill with the gear would probably slip a little.