Regarding Yuta's CE control, aside from the narrative standpoints backing it up, there are also feats that back up the fact that Yuta is as proficient as Sukuna in manipulating CE.
After Yuta activates his domain in Chapter 249, Sukuna states in Chapter 250 that
his total CE reserves now likely match Yuta’s, meaning that Sukuna and Yuta—post Yuta's activation of a DE—are equal in CE reserves.
This same Sukuna was stated by the narrator in Chapter 260 to be, verbatim,
at the same level of CE reserves as Yuta—in a more direct and explicit manner. Not to current Yuta's level, but to Okkotsu Yuta's level. The narrator implies a factual comparison with the intent of emphasizing that Sukuna truly matches Yuta's original CE reserves.
What does this mean? It means, that just like Sukuna, Yuta can utilize a DE as many times as needed, as utilizing a DE wouldn't really drop his CE reserves from their original amount.
Narrative wise, this fits perfectly as well, since Gojo has consistently criticized
Yuta's CE control throughout his career as a sorcerer.
The way Yuta uses the Limitless is also telling, as the technique is considered to be
complex and
unusable to use without the 6ES even for someone like Sukuna. This suggests that Yuta must already possess highly refined CE control as a foundation before even attempting to use the Limitless. Simply being in Gojo's body doesn't grant him Gojo's skills of CE control or mastery of barrier techniques—which is why he relies
on his own in the first place.
All Gojo needs to do is use the CE manipulation skills he was born with and grew up with to the maximum extent that a body without the Six Eyes can handle.
Ui Ui's CT is the perfect solution to this problem, and with this much foreshadowing leading up to it, it becomes painfully obvious.
The Yuta stocks are crazy.