I agree, horrible change. Gives insane power to junglers that have the ability to invade and gives nothing to the team that is behind. Its basically screwing the losing jungler out of ever getting a buff. It makes it so leaving one little guy at blue buff is strictly better than full clearing and actually managing your timers. I would love to get some clarity as to why they want to make a change like this in the first place; I see absolutely no benefit.
The other big problem for me in their big update is the rift herald changes. This buff that lasts for 20 minutes (at worst, take it at 19:00 and have it till end game) and can't be reduced or taken away at all is a HUGE advantage to an early game team. It is straight unfair. Maybe if a % of the remaining buff was lost on death it would make a little more sense, but to give such a powerful ability to a champion for such a large portion of the game with no ability for the other team to deal with the buff? Seems pretty broken to me.