Yes, if you read the most recent patch notes carefully, you'll see that the devs fixed an exploit with exemplar missions in AE and patrol XP that reduces the amount of Inf generated. They did this to address problems with inflation that affects all players, even those who don't AE farm. There's been wailing and gnashing of teeth for a week about it. There's a 40-page thread going on and on about it, as well.
Yes, you now make less Inf on those AE farms. But in the long run, the value of your reduced Inf increases, because less Inf in circulation makes it worth more. It will take a few weeks for the economy to stabilize accordingly.