Main improvements needed from last season
imo
Man Utd - Out and Out striker. Still have yet to sign one but first team is still very strong.
Chelsea - New striker, winger, cover for defence and a right back. Good striker in Pizzaro, good winger in malouda, Centre back cover in Ben Haim but still lacking a quality right back.
Liverpool - Left Midfielder, two strikers. Have got Babel for left midfield and Kewell might be like a new signing if he can stay fit. Also have Torres and Voronin for new striking options.
Arsenal - Defensive cover, quality winger, main striker. Have got a striker but haven't improved as much as I would have thought they would.
Spurs - Left back, centre midfield, left midfield. Good signing in Bent but not sure if they could have spent that money on a left midfielder where they still need improving
imo. Good signing in Bale for left back.
All in all I think if Chelsea sign a quality right back they would have improved the most but at the moment I think maybe Liverpool. They were very good at the back had have strengtened in all the areas they needed to.
Spurs, if they sign a couple of top midfielders to replace the likes of Malbranque they will be very strong.