Of course the 7 signings count, but we have also improved post those 7 signings. If we take out the intangible metric of quality of football (not saying its not important), the progress made by Jose in the league is undeniable. Some of the stats of our previous seasons in PL at this match week 30:
Season Played Won Drawn Lost GF GA GD Points
2017/18 30 20 5 5 58 23 35 65
2016/17 30 15 12 3 46 24 22 57
2015/16 30 14 8 8 38 27 11 50
2014/15 30 17 8 5 52 27 25 59
2013/14 30 15 6 9 48 34 14 51
2012/13 30 25 2 3 70 31 39 77
2011/12 30 23 4 3 74 27 47 73
Its clear to see Mourinho started by improving the defensive stability of the team in his first season. The last 2 seasons have been the best defensive seasons in the last 7 years. This year, we have been able to convert the draws into wins by improving our attacking output and that reflects in the goal scored. So in all visible metrics, we have made progress and are headed in the right direction. Whether we could have done better is a hypothetical question which none of us can answer.
What is clear to see is improvement and progress.
* As an aside, Sir Alex genius is truly reflected in our 2012/13 season. His 2012/13 team would have been only 4 points behind this City team.That is an incredible statistic considering the difference in individual quality between that team and this city team.