Three Things We Need to Figure Out

[hal9thou]

Vardy and Okazaki drop deeper than strikers in the classic English 442 you're thinking of.

and sometimes one stays up top to give them an out, ie 4-5-1 when ball lost

[nasser95]

Anyone who thinks Leicester play a standard 442, or even thought Sir Alex played it in the mid to late 2000's has clearly not watched the matches. The players are trained to roles never seen in that formation, its why it's unpredictable. 442 becomes stale and predictable without something unique. In Leicester's case, that is the deep forwards.