I didn't have access to the raw translations initially, so Toyataro's intent is well and good (in trying to establish that technique matters), but it's still a retcon of massive proportions and inconsistent with everything that has been established prior to this arc.
Ever since Goku and Piccolo fought Raditz, technique has frankly not mattered. Outside of clever tricks or deceptive maneuvers designed to catch a foe off-guard, it hasn't mattered in the least. Prior to this chapter, had Roshi tried hurling Kahseral out of the ring, Kahseral would have sat there and chuckled before finger-flicking Roshi out of the ring himself. If Roshi knew quasi-UI the whole time, Goku, Tien and King Piccolo would have gotten curbstomped in their fights with him if it gives him the ability to dodge the attacks from Jiren level foes. At very least, they would have never been able to lay a finger on him. He would've been able to compete in the 23rd tournament just fine and undoubtably been a winner. This is a dude who competed for the purpose of keeping his students motivated to keep getting stronger. If he can still beat them, no need to sit out.
Now we have him throwing punches that Jiren of all people feels the need to dodge or block with his hands (despite being perfectly willing to stand there and tank punches from SSJ Goku - in the anime anyway). Has Roshi become Kenshiro all of the sudden? Has he found a way to hit pressure points in such a way that it does not matter how strong his opponent is? Having your body independent of conscious thought is well and good, but we're talking about overcoming a speed gap that may as well be the difference between 0.1 and 99 googleplex squared. All of the technique in the world is not gonna do that, which is why "training" and "getting stronger" has been the Goku and Vegeta's method for dealing with the bad guys. Hell, if we're trying to find some semblance of consistency in this series, Burter level people should be completely invisible to Roshi ---- to the point that his body doesn't know what to react to in the first place.
Now if this chapter is Toriyama's way of acknowledging that he f-cked up the battle system in this manga by making it all about boring ass power levels, I give my blessings and hope that technique is now a permanent staple to fights. I don't have a problem with it. I think geekdom101 put it best however. Toyotaro puts the BS in DBS.