IOS new architechture will be more vulnerable?

quotes from wired interview with Mike Lynn " WN: So this new version of the operating system that they're coming out with, that's in beta testing. Lynn: It's actually a better architecture ... but it will be less secure.... That's why I felt it was important to make the point now rather than sweep it under the rug. I think it's something that we can fix.... " " But at the same time, now that I think they already are, I will say it's not as bad as you probably think it is. Not yet ... because the version that makes this an unstoppable critical problem is not out yet. " What exactly does this mean?