Take this with a ton of salt, but i don't think her 66T alone is very good. It does no damage, and only guarentees stuff on Hi-counter (3P). PPT is good for mixups and mindgames though.
I suppose i can offer some very bias tips: this is obvious but Rachel sort of struggles at long range she does have 2 good tools though 236P and 66K which still don't reach very far and are highly reactable. She struggles with traditional pressure (punching and kicking) but her PPT is amazing and her 66T is ok. (Sorry for the idiotic text wall XD)
Not only that but she can do 3K to wall splat and do her grab. Ending moves also in 6kk or 6pkk she recovers quickly and can run up to you to apply more pressure