The positions we are obviously lacking in is at cb - Williams looks poor (although think and hope its's down to not having a quality partner), Mori is never good enough and Holgate needs experience and well to just get a bit older. stronger and mature.
Central midfield - i think we are good mate, what we need is that position which has been occupied by any one of Valencia, Mirallas, Lookman etc, depending on formation, either a top second striker, a wider player or a central attacking midfielder, or any combination of that. - think Mertens or Mata etc
Put say VVD and Mertens into the starting 11 and we'd be right in the mix for top 4. Hell even adding players a level bvelow those two like keane and Siggurdson would probably have us in there
Obviously we also need a new left back to at least give us an option other than to play Baines every game even when not fully fit, and we need another striker who isn't utter rubbish