Had high hopes for Dele Alli. Hopefully he can develop into a real playmaker for England.
I thought Alli did pretty well all tournament especially when you consider what he had to work with but I don't think he is gonna develop into something special as a playmaker but a very solid support player who isn't a disgrace to a team playing at that level.
Rashford looked like he has a lot of potential.
Lallana was the only one who really looked like he was playing at "world class" level, Sturridge and Vardy played serviceable games but only so much they can do with the rest of the composition of the squad (EDIT: And as someone else said when they are mostly in it somewhat for themselves).
1-2 others like Cahill played a competent enough game - I definitely think there is enough talent there that a good manager could utilise to get a good result in the Euros or World Cup.
EDIT: Despite what some say I think the squad lost
all confidence in their manager at half-time in the Iceland game they just went to pieces and that was more than just Iceland putting them under pressure.