Pressure and Confidence.
Win today and go 3rd. Can't take it, freeze. Confident to take risks, play for percentages? No, play it cautious keep players behind the ball.
Neville is correct, blame the lack of quality and mental strength in the so-called 'experienced' players. Their only experience is being mediocre.
But it can change. The season before Fergie's first title, United froze as the end of the season came, they hoped Leeds would wobble, they didn't and United looked like a team that would justify the taunts from the Kop 'you'll never win the league again'. What happened the next season was down mainly to luck, a telephone call that unexpectedly produced a genius, a very arrogant one, who's confidence and belief rubbed off on every player immediately , and the rest is history.
United desperately need one or two if possible players with this mental strength, allied to great ability. It would transform a team that plays like its dazzled in the headlights most of the time, to one that enjoys playing. No-one in the team looks like they enjoy it, no-one plays with a smile on their face, its too much like hard work.
Watched 'Pool play Chelsea, ist half only. Its not like they played beautiful flowing football, they didn't. A lot of passes were long, by-passing midfield and a lot were very loose. But they never stopped trying to play forward, the forwards were always running. It was typical percentage football, in fact it was typical Liverpool football from the 70s and 80s. Despite all the money in the EPL it doesn't have teams playing marvellous football, most players are very average on a historic basis, which is why City and Liverpool are running away with the title again. If Liverpool can get success with percentage football with mainly players from other EPL clubs , plus two excellent additions in CM and CF, then so can United.
It needs two 'central spine' excellent additions with arrogance and the skill to match.