Kind of disagree, it's pretty impressive in terms of TK imo. But yeah I guess it does depend on factors. Like Nalen Raloch's example was impressive, since he straight up ripped a massive boulder out of the ceiling causing the cave to destabilize. Maul's wasn't that impressive by contrast imo since he barely actually did anything to the ceiling itself.
I thought that made it more impressive, personally. He didn't make any effort to collapse the ceiling, but the force of his push cased it to topple unto itself.
Maul collapsing a portion of cave ceiling when Force pushing Kenobi isn't really his best feat. Him collapsing an entire tunnel, which didn't have any of it's structure compromised beforehand, is far more impressive. Potentially his best telekinetic feat, if not one of them.
__________________ “The galaxy must experience the pain of death and the rapture of rebirth as I have. I will bring chaos. It is time for war.”
What would you say is his best? Other good ones are pulling the Eta-Class Shuttle off of a cliff, blowing dozens of droids/soldiers away, ragdolling Kenobi.