I'll be surprised if Vegeta's technique isn't just energy absorption (or energy draining without absorption), considering how we get that shot of those tired Yardrats.
Toyo's Goku himself has also used lower forms to converse stamina (U6 tournament) and even created a special way of using SSB to conserve power with it in the Future Trunks arc. I think this is different scenario though, since it was about fighting while holding back without any real tricks behind it, just pulling his power, and that has never been a big Goku thing. Pretty much the only time Toriyama did it was when he retconned Goku into being outright stronger than Fat Buu by revealing he was holding back in their previous battle.
Pretty sure 73 will still do something.
Vegeta did get a variation of SSB Blue in the manga too, although the only difference in the manga is pretty much the way the aura is drawn (note how it doesn't have the bubbles that manga SSB has, rather than that it has a fiery aura).