Sackey hasn't done anything wrong in the six nations, but he hasn't exactly set the world on fire. This is the same case as Vainikolo. Their not coming into the game enough which is a real shame as they could both do significant damage.
At the same time however, it isn't like they are being played into the game much. We can see what they do at their clubs, so you've got to look at the reasons why it isn't transpiring to the international game.
However, back to the discussion, two of England's brightest stars brought into the squad in the space of a few days. I for one would love to see Sinbad on the wing next weekend. He's proven himself at Gloucester and has already had international experience. I don't see what the risk would be.
Looking at the flip side however, its a proper shame Strettle won't play a part in the Six Nations this year. He showed some positive signs against Wales, and will cause a selection head ache for England later this year, and possibly the Lions. However, one mans misery is another mans gain...