There will be a respawn change from 2:30 >>> 2:00 per non-buff camp, a 5% decrease in gold/xp per camp but a 12% increase in xp for pure farmers with optimized pathing.
As someone who likes to play raid boss Shyvana and show up half way through the game as a monster, this is a huge win for me! Farming junglers may actually be back next season!
Thank you for listening, Riot.
Source: Mark Yetter on Twitter