We need a DM in the class of Krychowiak. With a top class DM, we will have the luxury of playing a diamond 442 with 2 strikers up front. Emre Can does not have the passion to be a top class DM, we need players like Kante or Matic etc.
Sturridge has already lost his pace, playing him as a lone striker is not enough to break down the parking buses. With a diamond 442, we can partner Sturridge with Origi or Mane. Then, we can attack the parking bus by pace, technical skill and aerial power.
When facing bigger teams or in most of the away games, we can return to 433. A midfield 3 with Krychowiak class DM, Can and Henderson or Milner will be very reliable in defense and work rate. Offering full license for the front 3 to attack.
Although we failed to get Krychowiak, we still need to try our best to get a top class DM.