If the 3A is < then it's losing base value and probably getting a -2 at best. 6.40 points minus 1.28 (or more). That's 5.12 points. If she drops to a -3 then she's at 4.48 points. Underrotated jumps do not keep the full base value.
Her 2A at the end of the GPF free skate was (in the bonus) 4.29 points for comparison.
If she replaces the 2T with the 2A in the combo to open up the 3A attempt, then she gets 2.20 more base value points if it stays second half, but also has to get through a more difficult sequence to begin with.
If the 3A isn't squeaky clean, it's really not that much more of a benefit by possibly underrotating and get negative GOE.