Jarvan and Wukong feel like the only true divers

They jump into a team, disrupt the flow and present a force that must be dealt with first...Jarvan less so cause of mobility creep but still. The rest simply don't present enough of a threat in being able to "dive" into a team and remain a large threat. An annoyance sure but not a large threat.

I feel like true divers should not be relegated to only acting as a "disrupt assassin" in locking down a single target as the most recent divers have made to do.