So he's been called up because Ludlam is out with bruised ribs and Lawes is only 50/50
Why? It's Italy, we ought to win, if Isiekwe played 6 and Ewels/Hill at SR, what do England need Launch? If they need a 6-a-like, then presumably, you'd call up Earl or similar, not another SR'er?
And given in the longer term you'd want a fit and firing Launch, perhaps it's better to get some match fitness in the Prem?