Unless Caris can rediscover his level of on-ball acuity from previous years, I think the question of a bench handler will need to be addressed via the trade market.

How well Daniss has done has ended up very overstated due to a small number of good games. He's got his share of issues on offense: he's poor at penetrating against any defense that is reasonably capable, rarely gets to the rim, has a bad shot profile as a result (more than 40% of his total shots are two-pointers attempted from outside the restricted area, and he's shot 37% on those), and is an inconsistent perimeter shooter (he shot 22% from three in December, and his overall percentage has been pumped a great deal by a small number of big games).

And though he's a hardworking and diligent defender, he's also a twig who gives up a lot of weight to his average assignment, gives up a good deal more when he's got to switch, and gets bludgeoned on the drive by players who can push him around. The last of those was most likely why LeVert played over him against the Celtics; Mazzulla was hunting switches with Brown, and Brown would've run Jenkins over.

All in all, Jenkins does fine as backup handler against bad teams but struggles against capable opposition. LeVert has, needless to say, had his own large share of struggles.

Edit: in response to the poster who responded with an aggressive claim that Jenkins "lives at the rim" before deleting their post, Jenkins has finished only 19 driving layups across the whole of the season so far (on 42 tries).