Upon further inspection of this scene, your claim that Linda would have had to have said "Moon Cryyyy... sis, Power!" is not true because when she says the "Moon" part of her version, she says it when Sailor Moon has mouthed two syllables. When the first two "Crisis Make Up!"/"Moon Crisis Power Transform!" parts are spoken, Sailor Moon mouths five syllables total. Both Kotono and Stephanie say the "Up" part of "Crisis Make Up!" with two mouth movements, but for Linda, she mouthed "Moon" on the first two syllables, crammed all of "Crisis Power" into just the third syllable alone, and then mouthed "Transform!" into the fourth and fifth syllables.
The animation had given her the perfect opportunity to mouth just the five-syllable "Moon Crisis Power!" with Sailor Moon's five mouth movements both times, especially if she was gonna mouth "Moon" on both the first two syllables, anyway, enabling her to cram only "Crisis" into the third syllable to avoid having a pause between "Cri" and "sis". After all, the word "Crisis" can be mouthed in English with just one movement despite having two syllables in it.