He'll need to. He has his work cut out though mate
For me our biggest problem and the one that needed addressing as soon as the window opens is the midfield. That is where we are losing points. We rely far to heavily on the legs of Gana and 35 year old Barry. That's it.
Sadly Jags is finished and needs replacing.
We still need a box to box midfielder who can control the pace of the game and be the link between our defenders and attackers.
We still need a No 10 who can unlock a stubborn defence.
We still need a striker to push Lukaku for a starting position or play along side him.
The worrying this is bar the Jags issue who's decline has happened almost over night, the rest of those positions have been a problem for 2-3 seasons and both Koeman and Martinez noted these positions needed addressing but didn't do it.
We don't need Depay - not unless we are shipping out Kev or someone as we have enough inconsistent wingers.
Then there are the other positions that maybe aren't a priority but will be come the summer. Another RB, another LB, a proper No 1 GK. I fully back the manager but unless he's backed this team are going to achieve sod all.