In her pics she looks like a more forward moving horse. I would start by working on the more HUS type classes.Showmanship would be another good class to learn for the both of you.Sounds like she is still pretty green in her training & needs to learn collection & moving off your leg/seat more. Once she is better schooled in that, I find ability to neck reining just comes on it's own
. If you don't want to pursue the rail type classes or English other option is to try schooling her in some of the Gymkana events
Just a ? Why is her halter so loose??
needs to be pulled up a few notches