That happened to one of our teams once. The coach scared them and they weren't sure how much to disclose, so they gave plantext and advantages (they still won though- haha).
Now we only disclose when they ask, and then only disclose plantext if they specifically ask for it. If they get pissy we tell them our coach only allows plan text disclosure.
I think disclosing makes the debate more fun. Sure generic DA's and CP's are easy to beat, but they're blocked-out and boring. (We run a less-common case, so we get these a lot). Oncase turns/attacks and specific DA's are more interesting (especially because you know the case better than they do).