They want to cripple pve :]. they are going for scarcity so this patch is 2 birds with 1 stone, increasing ship deaths in pvp and reducing supply of everything in pve combat related in 1 go, obviously some pve players are smart enough to find alternate ways of farming eventually in like 1 month or so but still the clear speed of these sites would have dropped as they where probably already using the most time efficient method which in itself is intended in this change.
With reference to this thread: EVE Online Ecosystem Outlook
My guess is that all sites that where bearly tankable will be sniped after this.