Odd as it seems, not all skaters like the 3t3t combination and find it harder than some other combos. But I think you're right that Adelina should do the combination that is easiest for her/gets good points, whatever that is. She gets good PCS, and has a good PCS reputation, so pushing the tech envelope does not pay for her, whereas a new kid on the block like Gracie Gold needs to really go for her tech levels.
Christine Gao needs to learn to center her spins and stop flutzing. That said, this was her best outing in an SP in some time, IMO.
People forget that about 1/2 of the stuff in PCS is actually tech.