iOS 9.3.1 enables WIFI Assit, potentially breaking data caps

Upgraded to IOS 9.3.1 today, and after a problematic upgrade to 9.2, I took a moment to double check cellular settings and functions.

Normally I keep most application's cellular data usage to off. When Wi-Fi assist was rolled out, I turned that off as well, and kept it off. All this to keep data usage under a monthly cap.

Today's upgrade to 9.3.1 reverted WiFi assist to ON. This feature is the subject of 2 lawsuits against Apple due to lack of disclosure about this feature, and the feature's unpermitted use of consumer data plans.

The 9.3.1 upgrade turning this feature back on is a potential gotcha for those on a limited data plan who /thought/ they had turned it off.

Check your settings:

Settings > Cellular > Scroll aaaaaall the way to bottom > Wi-Fi Assist > (ON/OFF)

Edit: probably should have mentioned phone version. iPhone5 upgrading from 9.2.1. Perhaps the difference in experience is phone version? IDK...