The attack is incredibly weak, so it is a major area of concern. I think it should have taken priority over the defence myself, since that is where the entertainment comes from. I would prefer to watch a great attacking team with a leaky defence than vice versa, which is what we are seeing now. Even then, our defence is not amazing.
If you look at the total goals across our first-team front three for last season, they only scored 24 goals between them in their leagues. (Martial: 10, Rashford: 10, James: 4). There are no proven goalscorers in this team, neither are they creative.
There is no cohesion between the players; it is like they are a bunch of strangers most of the time. The structure of our attack is poor, there is no fluidity - it is like watching a crap stream, there is also no interchanging. It is all too predictable and easy to defend against, which is why we make no chances.
It is worsened by our midfield which is devoid of creativity. McTominay, Matic, Lingard are almost allergic to creating chances. Pogba is the main player who can create anything, followed by Fred being the second most likely. The issue is that Pogba will only be at his best if the rest of the midifeld dominates possession, since Pogba is not good at that side of the game. The rest of that midfield is verging on useless so that affects creativity.
So, no, it is not just the attack that is the problem.