After reaching the Gamma-Grade, Arcturus's physical strength has skyrocketed to new heights and he was several times more powerful than before.
It would take him some time to attain the same amount of control over his physical dimensions as he had had before and properly adapt to his newfound power that stemmed from being the Gamma-Grade Warrior.
Though at the same time, he already had some experience in this, so that it wouldn't be that hard. He needed to train hard enough for a few weeks before he would be able to control his physical strength perfectly.
However, the greatest benefit of this entire ordeal was the fact that he could now execute some more challenging stunts and moves from the Sardau Star Sword and Godslayer Style than before.
