He was a lot less surprised by a final battle than he was about having a wide expanse of nothing to travel through in the beginning.

"Oh man, I'm so not the right guy for this."

Despite Demyx's complaining, he seemed to be having no trouble dodging vines at the same time as he threw leaves at a mongoose to knock it down. In actuality, his already decent movement was a lot less hampered without his oversized weapon and need to keep himself in a specific posture to play it.