The thing about having these modes turn off when you move though, is that as some have said, you can inadvertently screw yourself over by moving. I've had it happen more than once where I turned around to emote my character looking around as some perceived noise and my expertise promptly turned itself off because of it. So even though I should have been ready for it, I was hit hard because my expertise turned off from that. Whether it needs balancing or some way that it doesn't apply an AC bonus unless you're in combat I'll leave up to the dev team, but I for one and glad that these modes will now stay on unless you choose to deactivate them yourself.