I can't avoid the feeling all the nen users with really fancy and complicated techniques are ultimately average, at least fighting wise. Sure, they might dominate under certain, specific circumstances, but such a requirement is a big weakness in itself. A simple, straightforward skill can be used in any situation exactly the same way, without preparation, without plans. It's easy to keep training stronger and to know thoroughly. Of course for a long time it can be used against them as well, if the opponent knows the simply skill, but afterwards such a nen user becomes quite unstoppable. At least until they meet a haxor like Kurapika.
I wish somebody would give the gamer girl a pack of tissues, to blow her nose.