The Rockets got impatient with the struggling (of late) Jimmy Jackson and acquired David Wesley who can play point and once upon a time had very good defense (that has dropped off of late). Boki Nachbar was going to leave at the end of the season and at least the Rockets are getting something back for him. I would also take JJ over Wesley any day of the week, but I can see what the Rockets are doing here.
Nene, Chandler, Marshall might be players that could help.
The Rockets do not have what it takes to acquire any of the 3. On top of that, they do not need the inconsistent and at times lazy Nene and Chandler.