The NWO members were stars or superstars so getting them over was easy and it didn't devalue whoever took the loss. Most of the NXT are really inexperienced and some of them aren't good in the ring yet and they WWE appears to have a problem with having certain guys lose straight up.
They try too hard to keep certain guys "strong" but end up making other guys look weak who they'll need for main events later. Miz has now been pinned cleanly by John Cena and Randy Orton and it looks like they're setting him up to be the first guy to fail when he cashes in MitB and I think he has real potential and sometimes they act like they do too.
back to another topic for a sec
I'm not sure what WWE will do with Tyler Black. He's the first guy to be ROH champion who I don't see "big star" written on since James Gibson (Jamie Noble). He's really good but he's not in the same league as Danielson, McGuinness or Samoa Joe. He's sort of like Morishima, good with spurts of great but wouldn't translate anywhere other than ROH. How WWE will handle him is a huge ? for me and the same goes for "Roughhouse" Ryan O'Reilly, who is a smaller version of Mike Knox in some ways.