If you buy into Martinez "philosophy" and then compare it with other very successful prem sides you can see it lacks ingredients:
A-- Central Spines
Cech--Terry--Lampard--Drogba
Schmeichel--Bruce--Keane--Cantona
Seaman--Campbell--Vieira--Henry
Howard--Stones--Barkley--Lukaku
Clearly Howard is the weaker player.
B-- Central Midfield
Essien
Keane
Vieira
Barry
Clearly Barry is the weaker player.
C-- Left midfield / wing
Robben
Giggs
Overmars
Kone
Clearly kone is the weaker player.
If you compare man-for-man the rest of our first eleven with the others you wont find much difference in quality.
We clearly lack a top GK and LW as well as a "Midfield General" to play alongside McCarthy.
The GK and CM positions are key (especially with McCarthy and Jagielka out) and Kone whilst "just" a support forward means we cant switch the play effectively and teams can double mark Deulofeu.
As
@The Esk said we need "mental toughness" for me that means having confidence the keeper wont let in 2 goals per game and also having a driving force in CM.
At the same time
@davek is spot on about Martinez building the team. However he still needs a couple more windows to bring in these players...which would naturally instill more confidence in the team.
On top of this, weve had an unsettled defence, Mori bedding in and our top 4 players are still kids.
So as i keep saying, he needs 2 more seasons to get the players in and have them play together.