After the events of the King Piccolo Saga, we saw Goku training with Kami and Mr. Popo due to King Piccolo spawning a son - Piccolo Junior - in exchange for Kami re-activating the Dragon Balls; the Dragon Balls been used to revive everyone killed by King Piccolo and his children, including Krillin and Master Roshi.
While Goku's training was happening, the rest of the heroes - Krillin, Yamcha, Tien Shinhan and Chiaotzu - trained with Korin before carrying on their training in their own ways; not needing to train with Kami and Mr. Popo until the threat of Vegeta and Nappa some years later (Yajirobe temporarily joining them in the training but mostly spending his time eating).
However, what if Kami requested for the rest of Goku's friends to train earlier than this, just in case Piccolo Jr. proved too difficult for Goku to handle alone?
As such, we'd see Goku's friends join him on the Lookout to receive training from Kami and Mr. Popo before the 23rd World Martial Arts Tournament; this helping to increase their powers and abilities beforehand. While they'd still be behind Goku, it would increase their strength in any case.
Question is, how do you think this change would alter the remainder of Dragon Ball and later Dragon Ball Z?
Curious to see what you guys think.