Well, thanks to one of my friends to speak on the matter of how bad it is for every White Room student to have a superhuman LS. Tbh that scan is pretty debated in the COTE community, not for the 4th or 5th generations, but for the generations before.
First of all, it is narratively acceptable that White Room does improve human abilities (scan in the OP). It was found that through Suzukake (a person who was in-charge of designing the curriculum for White Room) was able to make a curriculum which could increase human abilities. In the scan, you can see that capabilities of various generations improved after his training.
Well, while this does prove that White Room makes its subjects go beyond a human full potential, we still do not know when and where. In V0, it is said that Suzukake himself determined level 5 or 6 as the limit of the human development.
A problem with Takuya, Ichika, Tsukishiro, Shiba having Superhuman LS: Now, all of these people have feats which come near to each other. We don't know where do the instructors scale or how the instructors are comparable to each other. For a lowball, let's give them the level they are confirmed to have trained in. It would be level 4. Level 4 is still lesser than level 5 or 6 (basically what is considered the limit of human development). Now, while the character who reach the "limit of human development" should basically still be superhumans (as they all should have their human abilities improved by the curriculum), we still don't know what actually is raw "peak human". For one, it can be level 2, considering how a huge part of subjects had called it quits around this time, and it can even be as big as level 4. While yes, Takuya and Ichika do have Superhuman Physical Characteristics, and scale massively above the characters who already have them, it is still not narratively enough. Having Superhuman Physical Characteristics doesn't define a Superhuman in LS.
Who scales to Superhuman narratively?: Now, a question on who actually scales to Superhuman narratively. So, without a doubt, it would be any of the people who made it to level 7, even if barely, as it would be substantiated enough. So, 4th generation students should clear this.
For 4th generation students (like Ayanokouji, Shirou, Yuuki and others who survived more): LS should be "
Superhuman".
For 5th generation students (like Takuya, Ichika): LS should be "At least
Athletic, likely
higher"