"You should be thankful, he's only really ever taken on one other student." Sure Piccolo seemed to help out others here, but nothing compared to with Gohan. Which maybe for the best from the stories Vegeta heard of the early days of that training, at least from a human standard. Honestly it sounded about right for what a Saiyan would do, maybe even a bit kinder. They tend to just send their kids off to take over planets by themselves.

"Did you ever tell him about being able to access that god fighter energy of yours?" Because that was of great interest to Vegeta, not that it would aid Piccolo in anyway. Short of there being some of god form for Namekians out there, and who knew if there was or not with how his people would spread around the universe. If anything he imagined Piccolo could give Cassie more pointers, not in the sense he knew how to use it, but just in the fact he's witnessed both Vegeta and Goku in those forms enough times to understand how they worked.