Well, the context here is Nicholas Robertson is actually a 2nd round pick from 2019. His career arc spiked in development the first year post draft but has been a disrupted since the pandemic, but otherwise expectations were accelerated, only to hit a traffic jam.
Look at other highly regarded guys like Shane Pinto or Bobby Brink from that draft and round and nobody's disappointed in their development. 5th overall Alex Turcotte has done even less and I don't think people are in a panic.
That said, I'm not crazy about the player type specifically. Honestly, there's a lot I don't like. I don't know if he's processing the game or understanding his role or what kind of ground rules the Leafs are setting for him. But from a developmental view, if he needs more time, it's quite natural at this stage.