The key will be how good a goalkeeper they get and how good the defenders are they sign.
I think they see that as a solution to their problems but I doubt they're going to get players good enough in those positions to transform them.
Their real problem is that they have no evident structure. They don't defend as a unit and are entirely unorganised. That was a problem from last season that they wanted to ignore.
They've then hired a manager who seems even more kamikaze and to think running about is the solution.
As much as Edouard seems to have chucked it, if they sell him, I'd be pretty confident that causes problems for them in an attacking sense. On recent form, you wouldn't back their recruitment team to bring in a better player than him when he's on form.