What I can interpret about Shin or rather Kid Shin, is the same case of Boruto being resistant to receive a serious punch from Delta and Kawaki fast enough to save Naruto and Himawari, even faster than Naruto in this feat, that both being at its base.
It is clear that both are far from the level of Delta and Naruto, but they have relevance at that moment due to the Script, Kid Shin is exactly the same from my point of view, Kid Shin is clearly below the level of Naruto and Sasuke to be even a threat, we see this with how easily Sasuke handled his surprise onslaught on their first date. I took a look at Gaiden here and I think Kid Shin survives Sasuke's Katon, not a good evidence, because he survived and didn't tank, his body was all burned and weakened, after that, Shin only needed one of his knives to kill him definitely showing how close his foot was to the grave. About Chidori we can use exactly this scene of the flames to show that Sasuke was far from going with his full strength, Kid Shin received the Lightning Release and soon after he gets up without any injury, if in a moment with a single Jutsu Sasuke put him on the brink of death, most certainly with a Jutsu that he lifts without injury, has not been used in its entirety. Something I can use for support is the fact that Sarada and Chocho feel confident in a fight against Kid Shin and even manage very well in front of him, demonstrating that they can stay in a fight if well structured.
Good supporting evidence is Sasuke's Rinnegan lacking his Tomoe, as shown when Sasuke is weakened, but this is almost never shown later, leading me to believe that perhaps this arc was Sasuke's weakest moment within. of the work Boruto.
In the time travel arc, from what I read here, they mention that Urashiki and Sasuke spent their greatest amount of chakra on that trip, even more so Sasuke who had his chakra stolen in the middle of the trip, but something like the loss of their Tomoe no Rinnegan is not demonstrated, would lead to Gaiden Sasuke being even more weakened than Sasuke from the Time Travel Arc.
Maybe a good alternative for a weakened Sasuke is to put him at the level he demonstrated in that state, such as the level of Classic Jiraiya (high 7-C) who was able to fight Urashiki and super Urashiki next to weakened Sasuke. , Boruto and Naruto.
If Sasuke Gaiden would be in a more weakened state than in Time Travel, it would put him on the same level or higher, and that would escalate to a rusty Naruto years without any sort of combat, Shin who would escalate into both Naruto and Sasuke and Sakura who would climb over the top. Shin.
Sakura Gaiden = Shin = Sasuke & Naruto Gaiden </= Sasuke Time Travel Arc = Classic Jiraiya = High 7-C
And that wouldn't be so inconsistent, with Classic Naruto and Boruto tiered close to High 7-C at that point in their lives.
In short, a weakened Sasuke would receive a massive nerf. This would affect Urashiki's scale as well, but it's certainly a sacrifice we're all willing to make.