We most certainly would notice a difference. Mukasa is no winger and McAidoo only turns 18 next month. Both are wonderful talents but fall far short of the physical requirements immediately needed.
Savinho actually had 4 goals and 3 assists in 1,500 minutes, which is a disappointing return, but it's only his second season and one punctuated by injury. What I would note is that he looked much stronger physically at the end of the season, so I would rather keep for now and see what Maresca can get out of him.
The prevailing narrative for some is apparently to get rid of practically everyone, but, for me, the attention should be exclusively on adding to midfield and right back.