I've isolated the above phrases to show the biased points in your post.
1) Rose and Walker have "not much space to improve", yet Valencia, who is 31 years old (5 years older than either Walker or Rose), can apparently improve to be as good as them
2) "Smalling can easily match Alderweireld". Well, maybe, but he's yet to do so, and "can" doesn't necessarily mean "will".
3) "Kane ... not making huge steps"
Well, I guess so ... unless winning the Golden Boot and scoring 59 goals in the last two seasons counts as "not making huge steps"
4) "Ibra .... he's not going to score less than Kane". Want to bet?
5) Mata is "comfortably on par or better than [Eriksen]". Last season Eriksen in the league had 6 goals and 13 assists. Mata in the league had 6 goals and only 5 assists in almost the same amount of playing time. His stats rating on Who Scored was 6.8 compared to Eriksen's 7.45.