What changes? Yes you can say Kizaru won round 1, but do people genuinely think that this one round showed the highest amount of output Luffy is capable of? A single named attack, two notable instances of unnecessary damage in the form of the laser barrier and protecting Vegapunk, and 2 chapters of G5 shows that's all Luffy is capable of?
This is one of the those cases where one guy technically won the fight, but I think the other guy is overall stronger when I factor in his other performances. Luffy's next use of G5 lasted a lot longer, he used multiple named attacks, flattened Kizaru and Saturn, fended off the Gorosei etc, so there's no way I'm going to say Kizaru is above Luffy based off a single round with so many asterisks attached to it.