The problem here is that while fixing that issue, it will put us back to boring Jose days. We'd likely see notably fewer goals conceded, but also notably fewer goals scored. Personally if I had to pick, I'd prefer a high scoring, high conceding game over a 0-0. It's the reason I opted to support United instead of other teams like Liverpool who at the time of me getting into football were very boring to watch.
But if you look at our coaching team, who is the defensive coach? What pedigree do they have? I think our attack is fine, what we need to solve is the defence. Buy a real defence coach, one with proven pedigree, to control our defensive actions and structure. This is something we need more than a change of manager, in my opinion. We should still be an attacking side like we are at the moment when we have the ball, but we need a rapid change of action in how we manage our defence.