This would actually lower her BV. You can only repeat 2 types of jumps, she repeats Lz and F, highest values ones. If she does 3Lz-3Lo and 3F-3Lo, she would repeat the Lo twice, and that has a lower value than the F which is what she would be replacing. Her layout right now is the highest possible BV (minus 2T instead of 2Lo) for a no 3A no quad program. No other way to up the value.
As for 3A, I'm not sure how familiar people on here are with jump technique. But the way her Axel is, she will never get a 3A. You need a VERY good 2A to even consider training at 3A, and it's clear that her 2A is one of her weakest, if not her weakest, jumps. It's out of the question, unless she dramatically improves it to Sasha/Alena/Rika quality, which will probably never happen because it's never been even close in her entire career. She is more likely to land a quad like the loop or flip, which are probably her best jumps. Probably loop, it's higher. But her jumps aren't huge now. She does however have a pretty good combination of height/rotation speed, but for those with successful quads like Sasha, her height isn't nearly close.
As for whether she needs to learn new jumps, that will depend on how the judges reward her with GOEs next season. the -5 to +5 range is huge, and she could lose her BV advantage very easily if others get consistently more GOEs.