It's more like Kuririn and Gohan not noticing Goku's power was rising when he fought the Ginyu Force.
Except Vegeta was able to.
Chapter: 281 (DBZ 87), P11.2-4
Jheese: “Wh-what’s going on…?! There’s no mistake that his battle power is only 5,000…”
Vegeta: “Ka-Kakarot rapidly heightens his battle power for the brief instant when he attacks…That’s probably to decrease unnecessary energy consumption…It’s for an extremely brief instant, so even the scouters probably can’t pick up on it…Th-this is an outrageous battle power…H-how did he get that kind of power?...”
Goku's bursts against the Ginyus were defined as instant, even Vegeta who was a poor ki sensor at the time was able to perfectly gauge his battle power, and those bursts were undoubtedly much shorter than the burst seen against Yakon. If your argument is that Vegeta wasn't able to gauge SSJ2 Goku's power, then he is inferior to Namek Vegeta or infinitely more incompetent.