It's not about Sherwood verses Poch though. The point GB is trying to make (and for once I actually agree with him) is that implementing a youth based system takes time, but is worth it and even more so in the current financial fair play situation.
It's about the expectation of the club. We seem to be currently saying that youth is the way forward. If that is truely what we believe then more than ever we need stability in management. We also need to be more willing than we wver were before to accept 'unacceptable' finishing positions in the league.
Let's say he lays his cards out in the summer and sells all the older players and went into the season with a team of Lloris, Rose, Walker, Dier, Vertongen, Bentaleb, Mason, Ali, Eriksen, Pritchard and Kane. This team would struggle, but it would be comfortably be the youngest team in the premiership, it would also be exciting and full of talent, it would not struggle so much that it would get relegated.
If Poch finished 10th but in the next season 8th, next season 5th, next season 4th and by his 5th season is challenging for the title with a team very talented players who have now matured into a fully functional group, is he a failure, should he be sacked?