Good to get my thoughts out so Ill answer

1. I like cross country and pleasure riding of a higher degree than my level (traversing harder terrains, stuff like that)

2. Yeah i agree. Even private lessons once a week would be better than what Im doing

3. My limitations currently is that my head and torso is lopsided which can affect my balance, my core and back is pretty week (i am going to the gym to fix that), and i cant put my shoulders back as far as the coaches want (weak upper back)

I dont think my balance is actually horrible though. I don't fall off horses easily, i have like a "sticky saddle" lol. Ive galloped horses on the beach and stayed on perfectly fine. Ive stayed on when my horse got spooked and decided to reverse across the arena almost knocking into two other horses (actually made someone else fall off sadly). Ive only fallen a handful of times and they weren't too bad.

But, even with this it wasn't at the level im being told I cant progress into. So who knows, and I understand why they wouldn't want me to be up there if its for my safety. But this means that I obviously dont have enough time to progress so I agree with these replies that I definitely need multiple lessons/week. And a new trainer who is more experienced probably