Henry is not a bad corner. In fact, he's actually a very good one. The problem he has run into the last couple of years has to do more with injuries than anything else. I think Dallas does need to keep corner on the back of their mind when it comes draft time, but you don't have to reach. More importantly, you don't have to move Henry away from it because he isn't a liability.
The really funny thing to me about all of this is how everyone wants a centerfielder. Well, guess what? Pat Watkins was generally regarded as the best "centerfield" type of safety prospect in that draft last year. The bigger knock on Watkins was how he would match up against slot receivers.
I would still like Dallas to bring in a veteran safety who can do the job. I don't think it's wise to automatcially write off what you've already got on this team. Both Watkins, and even Elam, have some ability. Get someone to help them - not just take their spot.