#3 Bench Strength
One cannot fault Manchester United for not spending in the transfer market to build a great squad. However, not all the talent that was attracted in the past five seasons has been a great fit to the team. A lot of good talent has been let go and the club has failed to attract and/or sign numerous other. By opting for second and third choice players in the transfer market, the bench strength is no longer threatening enough. Most of the first choice players don't even have to try hard to keep their place in the team. And an injury to any of these players clearly shows the result on the pitch.
With a strong squad, players have to compete for a place in the line-up week after week, thereby fostering and enhancing their skills. It's the prerogative of the manager to identify the right talent and create such a competitive environment to build a great squad. The choice of plenty is a good problem to have because you are covered for almost all eventualities. While there has been a lot of finger-pointing and blame game between past managers and Ed Woodward, it's the club that has been at the receiving end. Appointing a Director of Football at the club might not just be a good option but also a realistic long-term solution.