I named all those players bar Lingard in my post. Read it again.
Unfortunately the reality is that we cannot improve on all the players we need to in one summer, which would probably mean getting rid of Rojo, Darmian, Bailly, Jones, Young, Matic, Sanchez, Mata, Lukuku, Valencia and Herrera (obv the last 2 have already gone).
Mata on a 12 month deal with a year option would make sense.
We are not going to shift out 10 first team players, and buy 6,7,8,9 replacements this summer. There isint the money to do so.
So let’s be realistic, re-signing Mata allows us to keep a squad player at a low cost and therefore we can spend more money on the areas that need to be urgently addressed.
You asked did those names contribute goals, and said Mata is useful and score goals (yeah really that useful, this season Mata scored a goal in every 2-3 months), that's why i correct you those names u mentioned including the poor Lingard scored more goals than Mata.
Also u say we cannot shift out 10 first team players within a season. However if u think deeply, those are just number only. Did they really contribute to the team this season? Rojo played 5 games, Valencia played 6 games, Darmian played 6 games, including Sanchez, who only score 1 goal in Premier League. So the "true" shift out are only 6-7 players - Lukaku, Mata, Matic, Herrera, Bailly, Jones, Young, which is very reasonable if we want to rebuild our team. Don't remember we have Greenwood, Chong, A. Gomes, Tuanzebe waiting to promote, with 4-5 players buying, i don't really think that is unrealistic.
Keeping so many squad players without any starting line's quality is meaningless. If you really think we should keep a cheaper player as squad player, Lingard will be the one, our academy which is free (Mata was our record signing at that moment), younger, cheaper in salary, and of course a England player. If we buy a more RW or a forward,
Forward : Rashford ; Martial ; Greenwood
Left wing : Martial ; R. James ; Chong
Right wing : New RW ; Lingard
Forward : Rashford ; New Forward
Left wing : Martial ; R. James ; Chong
Right Wing : Greenwood ; Lingard
With our main formation 433, we don't even have a place for Mata as number 10, which not guarante he can really play well at that position, look at the match vs West Ham, vs Watford, even played him at no.10, he played badly and be subtitued early.