The fact that most of FCW guys are still green as fuck i don't think it would be wise to debut them straight in the main brands. Alberto Del Rio is clearly an exception because he actually has a lot of wrestling experience prior coming to WWE, the guy is ready. NXT will help these "rookies" tremendously because the show give them the experience of performing in front of thousands of people and also NXT provides a place and time for rookies to develop their characters so that audience know who they are. Just look at Tyler Reks, he just redebuted not too long ago and where is he now? He's stuck in obscurity because he doesn't get much air time to showcase his character, people still don't know who he is, if he had debuted on NXT it's highly possible that he would have received much better reception from the crowds right now because people would have already known who he is and there would have been a reason why we should care about the guy. So all in all i don't think NXT is a bad idea at all, it needs some change though, they really need to get rid of the ridiculous challenges because they're absolutely pointless. I'd rather see those challenges to get replaced with more wrestling matches and promos.