We thought the junglers with instant gapclosers were too reliable
So we nerfed the range on smite so they can't slow you when they're already on top of you beating your face into a bloody smear.
-Riot Balance Team
This made my night. This logic is so backwards it makes my head hurt trying to figure out how it made any sense at all. You're telling me that the junglers that only have to land a skill shot (or hop to a ward/standard), to literally appear on top of you, are going to be at all affected by reducing smite's range.
The ONLY junglers that this at all affects are the ones WITHOUT ANY GAPCLOSERS. Chilling smite is icing on the cake for lee sin, vi, amumu, and jarvan. For champions like Udyr, Hecarim (ult aside), shyvanna and skarner, the ones with without instant gapclosers, this ult further renders them as nonviable junglers in today's League of Mobility. Make it even more difficult for them to stick to a target.
or anyone else needs a buff, fine, but adding a long range slow to kits that are designed not to have one causes serious problems, especially for people who rely on long range skillshots, like
. They should be able to miss, and with chilling smite, they didn't.

all had increases to their sustain, team fight potential and/or clearing ability in the last few patches, and more are sure to come
on Lee or Jarvan simply because, as someone already mentioned chilling smite is just icing on the cake. Both of these have insane early ganks, so building trailblazer makes you farm your jungle faster and be healthier for a gank.