Before the season kicked off I thought that we had one too many props but were light in the second row / outside backs. We then brought in Russell, Minikin has regained some form and Wrench should be back next month (altough I expect that it will take him a while to recover form) - so that's the 3/4s fixed for now.
Losing Mikaele is a blow because he was playing so well but, based on shirt number, he was only going to be cover. If, before the season began, we'd had the chance to swap him for a second rower then we'd probably have been happy to do so. The only reason that we're talking about signing a prop as replacement is because we've had so many injuries and suspensions in that position.