The only real complain I have with how the show has progressed till now is Leorio's character development.
I guess they had to cut a lot, and he suffered the most, leaving a feeling he was only very lucky to be with Kurapika, Gon and Killua.

Of course being lucky and being able to team with people that will help you is also valid to become a hunter, but it doesn't feel right in the way he's been portrayed.
I guess his good points should have been when he healed someone important (those shape changing creatures) and the Bourbon/Ponzu cave trap. But it felt lacking.