The way I see it, Riot basically pulled a Skarner on Rengar. They came up with his kit around the idea that he'd only be able to jump to whoever he was closest to, so they gave him tools to support that - crit to reward getting a jump on a high priority target, CC cleansing to enable risky jumps to get someone that is being protected, long ult duration to have ample time to try and jump on who you want - but then after removing that due to feedback, just left him mostly as is, so he wounded up being the same fucking champion but with Zed levels of AD, a built in QSS and a 20 second TF ult.