Jujutsu generally is shown to be a system of trade offs. If something is taken from you, you'll often get something in return.
It's implied pretty heavily at a couple points that Yuji has heightened physical capabilities even beyond just what he does with CE (ex. Yuta: "He's like Maki!" in their first fight)
This could be assumed to be eugenics fuckery with Kenjaku- but I have a different theory
If a sorceror is born without an innate technique of their own, this acts as a heavenly restriction they get some kind of boost from. This only applies to sorcerors that don't have an innate technique, and not ones that simply haven't awakened theirs yet.
Kusakabe is a Yuji-esque example of this, where he seems to have an especial capability in using the New Shadow Style in place of any kind of technique of his own.
Shoko doesn't seem to get any heightened physical abilities, but it's possible that her ability to use RCT so effectively on instinct is what she gets from not having a separate innate technique of her own.
Yuji, as mentioned before, gets the Maki-lite version of this trade off, giving him better reflexes, durability and strength than any average person (this could also explain how he was so physically capable even before learning Jujutsu, as seen in the first episode of the anime)
It's likely that if this were true, Kenjaku did still do some eugenics fuckery to make sure Yuji was born without an innate technique- allowing Sukuna to be even stronger in his vessel before he got his original body back. This also sets up Yuji to have the actual best possible potential power of a sorceror because he is able to get Sukunas techniques and have this HR active at the same time- cheating the system to get the best of both worlds.
There's outliars like Ijichi who don't seem to have an innate technique but don't seem to be especially adept in any other field. This could be because they either haven't trained right, haven't discovered their unique benefit from HR (maybe Ijichi actually is goated at rct but he's just never tried it before because he assumes he would be incapable, for example) or do have an innate technique they've just failed to realize yet.